Washington DC Heat Pump Guide: Common Heat Pump Performance Problems

September 10th, 2012

The heat pump in your Washington DC home needs to work year round to provide heat and air conditioning. This is why you want to make sure it’s performing as efficiently as possible to save on energy costs and prevent break downs. You should schedule an annual maintenance check-up and inspection with a certified HVAC technician to test the efficiency levels.

However, there are a few common causes of performance issues to be aware of so that you can be sure your Washington DC heat pump performs at optimal levels. Call Polar Bear if you have questions about heat pump performance issues, or to make an appointment for an annual inspection and professional cleaning.

Airflow Issues

There should always be a certain amount of airflow (measured in cubic feet per minute) in your heat pump to maintain proper efficiency levels. If the airflow is less than 350 cfm per ton, it could increase your energy costs. You should make sure your HVAC contractor checks the airflow whenever your heat pump is inspected. Always keep the coils clean. Sometimes the ducts are not the right size, or the fan speed needs to be increased, but often cleaning the coils will help airflow, which is why it is important to clean and maintain the components of your heat pump. A certified technician will know what methods are best, so if you suspect an airflow problem with your heat pump, call a professional heating technician.

Air Leaks in the Duct System

Inefficient or poorly-designed duct systems may not distribute air properly throughout your home because of potential air leaks. There should always be a balance between the intake and return air in a forced air system, which helps maintain a neutral pressure within the house and increase efficiency. Some contractors argue over how tightly a house should be sealed for this reason, but if your heat pump is losing heat through leaks in the air ducts, this will greatly affect its efficiency.

Improper Refrigerant

Refrigerant leaks are another common cause of low performance levels in heat pumps. Most heat pumps already have refrigerant when they leave the factory and shouldn’t have any issues. Heat pumps that are charged with refrigerant when they are installed can sometimes have the wrong amount of refrigerant. Either too much or too little refrigerant will lower the heat pump’s efficiency and performance levels. Always check the recommended refrigerant amount or ask an HVAC technician before you add refrigerant yourself.

If the heat pump in your Washington DC home isn’t working properly, it is also affecting your heating bills. Call Polar Bear today to set up an appointment.

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Washington DC Air Conditioning Repair Guide: Air Conditioning Condensate Problems

September 4th, 2012

The beauty of air conditioning in Washington DC is that we don’t have to do anything to live in a cool climate even when it’s boiling outside.  Programmed to adjust automatically, modern thermostats make it even easier.

Air Conditioning 101

The process of conditioning air to a cooler temperature involves rapid evaporation and condensation of chemicals called refrigerants.  These are compounds having properties that allow them to change from liquid to gas and back at low temperatures.

When the liquid evaporates and transforms into gas it absorbs heat.  Compressed tightly together again, the matter condenses back into liquid with a residue of unwanted moist heat that must be released to the outdoors.

Over the course of handling the air to cool it, air conditioners are able to filter dust and dehumidify the air as well.  This release of moisture is why air conditioners have drains.

Condenser Coils

As the heat is removed from the gas, it forms condensation that must be drained from the system.  Tiny particles accumulate along the path, prone to shifting and resettling until they become lodged and can form a significant enough blockage to hamper the efficiency of the unit.  If the drain line becomes blocked, the unit drips or overflows the pan and works its way back into the house, causing damage and potentially mold.

Easy Fix

A simple act of maintenance performed twice a year and requiring no tools can eliminate the problem.  To check and maintain your condensate drain, these are the steps your AC technician will perform:

On the interior side, they will remove the panel of the unit and find the drain line, usually a plastic tube.  If the pan is full of water, there is a blockage.  On a whole house system, they then find where the plastic tube exits the house, making sure that it is above ground and clear to drain away. Flush the line with a short burst from a hose.

Regular maintenance is simply a 1/2 cup of warm water poured down the tube to ensure a clean and free flowing pipe, which can be taken care of during your annual maintenance visit. Call Polar Bear Air Conditioning and Heating today if you need heating or air conditioning service in Washington DC and the surrounding area!

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Heat Pump Maintenance Tips from Washington DC: What Happens When You Neglect to Maintain Your Heat Pump System

August 27th, 2012

Just like any HVAC system, the heat pump in your Washington DC home needs routine maintenance and yearly check-ups to operate as efficiently and safely as possible. You also don’t want your heat pump to wear down to the point of a major malfunction or breakdown, which can be costly to repair or may require a complete system replacement.

Here are some things that could go wrong and cost you a lot more in the end if you don’t keep up with the regular maintenance of your Washington DC heat pump.

Damage to the Compressor

The compressor in a split-system heat pump works whether you are heating or cooling your home. In the winter, the compressor reverses the flow of the refrigerant to defrost the outdoor coils, and in the summer it supplies the refrigerant to cool the home, as well as cooling the outdoor coils. Proper airflow is vital to keeping the compressor running smoothly. Filters that are not changed regularly, dirty coils, and dirty fans can all restrict airflow, which will damage the compressor. Debris around the outside components should also be cleared to allow proper airflow.

Decreased Efficiency

When dirty or broken components restrict the airflow, this damages the compressor and decreases the heat pump’s efficiency levels.  Not only is it important to clean your heat pump regularly, but you should also have it checked by a certified heating technician once a year. This will also prevent safety hazards and other hidden issues with the heat pump.

Improper Refrigerant Levels

Most heat pumps are charged with refrigerant at the factory; however, if models that are charged when they are installed are not given the right amount of refrigerant this can also affect performance levels. Refrigerant leaks and other common problems can be prevented by scheduling an annual maintenance visit with one of our qualified technicians.

Don’t wait until the heat pump in your home stops working, call Polar Bear Air Conditioning to schedule your yearly check-up today!

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Washington DC Air Conditioning Tip: Programmable Thermostats and Your AC

August 20th, 2012

Air conditioning makes our Washington DC homes comfortable during a hot summer day. However, air conditioners need electricity to run, and most of us are trying to reduce our home’s energy consumption. There are a number of ways you can make your air conditioning system more efficient, including upgrading to an ENERGY STAR rated unit and scheduling regular maintenance, but one of the easiest steps to implement is installing a programmable thermostat.

Programmable thermostats automatically adjust the temperature in your home depending on the time of day. You can save up to 10 percent a year by turning down your thermostat back ten degrees for eight hours a day! Most models allow you to store multiple daily settings, so you can turn you air conditioner down during the day when you are at work and while you are sleeping, and still have the temperature cooler when you need it. You can also still manually adjust the temperature without affecting the normal settings, giving you complete control and helping you save energy.

Programmable thermostats are not all made the same, and there are many different makes and models. An HVAC contractor will go over the different features available to you so you can decide which best fits your needs. Different thermostats work better with different systems, for instance some heat pumps need thermostats that have multi-stage functions, so it is best to consult with a Washington DC air conditioning and heating professional before deciding what to purchase.

Programmable thermostats allow you to save energy without sacrificing comfort, which is something that all of us are looking for. If you are looking for a simple, affordable way to improve your HVAC system, a programmable thermostat is a great choice. Most are easy to read and easy to use, call Polar Bear Air Conditioning today to learn more about having a programmable thermostat installed in your home!

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Washington DC Air Conditioning Tip: Things You Should Never Do To Your Air Conditioner

August 13th, 2012

Whether it’s a large central system or a small on, with proper care and maintenance, your Washington DC air conditioner should last for a quite a while.  Sometimes, however, people can do simple things which, in retrospect, should have obviously been avoided.

Some examples:

  • Don’t block the air intake–air is vital to the process, so laying anything over the unit (a towel or clothes to dry) will significantly strain the motor.  Always make sure there is enough clearance.
  • Don’t block the vents–likewise in a home, it is easy to move a sofa or lay an area rug over a grate in the floor or cover an unsightly vent in the wall with a pretty painting.
  • Don’t think it will run forever without cleaning the fins, vents and changing the filter at least once a heating season;
  • Don’t leave the units exposed in winter–always cover when not in use for long periods of time;
  • Don’t bury the condensate drain in the ground–in central units it is vital that the drain is left with a clear flow away from the house;
  • Don’t steam clean or use hot water to clean the fins–damage and corrosion can easily be caused by the heat; flush with warm water or spray.
  • Don’t remove the overload relay to force continuous running–VERY dangerous and a guarantee of damage.

A little attention to your Washington DC air conditioning  goes a long way to ensure years of comfort. Call Polar Bear Air Conditioning if you need to schedule a maintenance visit!

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Indoor Air Quality Guide: How Bad Is the Air in Your Home?

July 30th, 2012

When Was Your Home Built?

Washington DC homes built in the last 10-15 years tend to be well ventilated and may even have air quality systems already in place. It’s those built in the late 1970s and early 1980s that tend to have the worst ventilation (assuming they have not been updated since then).

This kind of poor ventilation can be dangerous, but usually only in that you have less fresh air and more indoor allergens and contaminants. Specifically, you’re most likely to suffer from things like pet dander, dust, pollen, and dirt in the air. On their own, these are not dangerous, but without fresh air to circulate them outside and ensure you get a steady, clean supply of air to breathe, they can make you ill.

How Bad Can It Get?

While it’s rare, some homes suffer from more advanced contaminations. The most common is mold. Mold grows primarily in dark, damp spaces. If your humidity levels get too high in the summer, the ductwork in your house is perfect for mold and it will blow the spores directly into your air, putting everyone at risk.

You should also be wary of exhaust fumes from your appliances that may not get properly removed from the house. Both of these problems can be fixed with regular duct and exhaust cleaning.

Outdoor contaminants can also make it into your indoor air. Things like exhaust and smoke, gas, radon, or other outdoor pollutants should be tested for when you setup a new indoor air quality system. There are filters and purifiers that will remove almost all of these contaminants, but they are not always required, so you should check before making a decision.

Ultimately, the odds are that your Washington DC home suffers only from some stale, dusty air. But, it is very important to keep everything clean and test it regularly to make sure nothing worse develops. Call us today if you want to learn ways to improve your indoor air quality.

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Washington DC Air Conditioning Question: What is a Matched HVAC System?

July 16th, 2012

It has been about 200 years since the arrival of interchangeable parts during the Industrial Revolution. Today, we laud being able to take a malfunctioning part from a car, computer or vacuum cleaner, replace it with a newly minted part from any number of manufacturers, then keep right on plugging along.

Although this is a blessing in most arenas, when it comes to your Washington DC air conditioning system, it is not necessarily a good practice. Heating and cooling systems work best when they are matched – but what does that mean? And why does it matter?

 Why Matched Parts Matter in HVAC Systems

When referring to HVAC systems, a matched system is one in which various components are designed to work together. For example, an air conditioner and furnace made by the same manufacturer can be matched, as can a furnace and a heat pump.

Typically, the matching is done in such a way that the “outdoor” components, such as air conditioners and heat pumps are designed to work best with their “indoor” partners, like air handlers and furnaces. There are also matched systems in which every component is matched to every other.

Efficiency Boosts

While this may seem to make maintenance and repairs a pain, the practice provides a big boost to the efficiency of the system. Because the components were designed and manufactured by the same team to work in harmony, the system performs optimally. Although you can often replace one component of a matched system with one from another manufacturer and have it work fine, the system can lose efficiency, often to a significant and noticeable extent.

For these reasons, it is best to make use of matched systems in your home whenever possible. This means choosing a new matched system to install, replacing broken parts with ones that match the rest of the system and even replacing older systems with newer ones to properly match, when necessary.

It may seem like a hassle at first, but it saves money in the long run by adding increased efficiency over unmatched systems. For more information about installing new heating and air conditioning systems in Washington DC, give Polar Bear a call today!

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Derecho Thunderstorm, No Phone Service, No Air Conditioning The Top 3 Reasons To Like Your A/C Company

July 8th, 2012

Why “like” or “follow” your air conditioning company on Facebook or Twitter?  To communicate and get help in an emergency.  We all learned the importance of social networks from the Derecho thunderstorms on June 29.  At Polar Bear Air Conditioning, although our phone lines were powered by generator and our crews were working, our phone company did not have power and therefore our customers could not reach us through our main number, even forwarded to our cell phones.  Over one million DC area residents also lost power in our homes, but many of us were able to travel to Wifi hot spots with power to recharge our devices and access the Internet.

For those customers who were able to access our website, we posted an emergency number on our homepage.  Wouldn’t it be great in a similar State of Emergency to receive a Tweet or Facebook post from your air conditioning and heating company, with an emergency number to reach us?  Polar Bear Air Conditioning will do this in all future emergencies that involve heating, air conditioning and communication issues for our customers.  But we need your help.  In the coming weeks, we will be contacting our customers and asking you to like us on Facebook or follow us on Twitter, or you can do that now by choosing the links on our home page.  We will ask you if you only want to be contacted in emergencies, or would like to receive newsletters and special offers no more than 4 times a year.  You can also opt to be contacted by email.  We will never sell or share your information with 3rd parties, and you will not receive more than 4 promotional emails a year.

We hope to not experience another Derecho for several years.  However, our goal is to be ready to communicate with and help our customers through all States of Emergency in all four seasons.  Have a quiet and cool summer.

Your friends at Polar Bear Air Conditioning and Heating, Inc.

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Important Air Conditioning Tips for Derecho and other Electrical Storms

July 5th, 2012

On June 29, a devastating thunderstorm complex known as a derecho created a State of Emergency in the Washington DC area, producing widespread destruction and leaving more than one million people without power.  Although derechos do not frequently move through our area, severe thunderstorms are common in the summer.  Do you know how to protect your family, home and air conditioning unit?  Here are some simple tips that can save lives and thousands of dollars.

1. Turn off your air conditioning at the thermostat during a thunderstorm.

Electrical control panels in air conditioning systems can be easily knocked out by power surges caused by lightning strikes.  In other words, the lightning does not have to hit your unit directly to damage your unit.

This applies to other electrical equipment as well.  Televisions and computers are at risk if running during an electrical storm.

2.  Don’t take showers or baths during a thunderstorm.

 Electricity can travel through metal pipes into your bathroom.   It is also wise to avoid other sources of water with metal pipes, such as faucets and sinks, until the thunderstorm passes.

3.  Are cell phones safe in electrical storms?

 Electricity will travel through electrical cords and outlets, not radio waves.  So, cordless phones and cell phones are safe inside, as long as they are not plugged in to an electrical outlet.  There have been reports of lightning strikes to cell phone users and iPod users outdoors, not due to radio wave transmission, but because the users are holding a metal object, and that metal attracts and conducts electricity.  It’s best to put away your cell phone and iPod if you are caught outside in an electrical storm.

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Washington DC Air Conditioning Tip: Icing Problems on Air Conditioner Cooling Coils

July 2nd, 2012

Air conditioning cooling coil icing problems can arise for a couple of reasons: either the air filter has not been properly replaced, or there is a condensing coil leak.  It is best to check and test the easiest problem first and then move on from there.

It is important to replace air conditioning filters as often as is recommended by the manufacturer.  A common result of not replacing filters frequently enough is a buildup of dust and dirt on the filter, which causes reduced air flow throughout the air conditioning unit.  With reduced air flow, the evaporator coil or cooling coil within the air handler can become blocked by ice or frost build-up.  Having cooling coil icing can significantly reduce or completely stop the amount of cool air being produced by an air conditioning unit.

Easy steps to diagnose and resolve air conditioning cooling coil icing problems:

  • Visually inspect the air conditioning cooling coils to check whether reduced air flow has been caused by cooling coil icing.  If ice or frost is found on the coils, thus blocking air-flow, proceed with the next step.
  • Turn off the air conditioning system completely to allow ice to evaporate, the unit will have to remain off until all ice is completely melted and drained away from the unit
  • Replace all dirty filters on the air conditioning unit
  • Once the a/c unit is de-iced and has fresh filters, it is safe to turn the system back on, to test whether the icy build-up happens again

If after completing these steps, when the air conditioning unit is turned back on cooling coil icing happens again, this could mean one of two things.  Either too little of the refrigerant is being released into the cooling coil due to a clogged capillary tube or a stuck thermostatic expansion valve.  Or the refrigerant charge is too low due to a refrigerant leak.  A refrigerant leak can happen at any point in the refrigerant piping system which would then need to be soldered and resealed, or it can happen in the cooling coil or condensing coil which could mean the entire coil needs to be replaced.  Fixing of refrigerant leaks should be handled by a Washington DC air conditioning  professional.  Contact Polar Bear Air Conditioning, one of our HVAC technician can identify the air conditioner cooling coil icing problem and execute the proper solution.

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