October 24, 2017
First of all, what is a heat pump? Basically, instead of a furnace, which typically uses natural gas to create heat for the home, a heat pump works like an air conditioner in reverse, absorbing heat from the outdoor environment and transferring it into the home. If you are wondering how a heat pump extracts heat energy from the cold air outside, consider the 2nd Law of Thermodynamics, which states that heat flows from hotter to colder bodies. When the temperature of the refrigerant that flows through the outdoor condenser coils is lower than the temperature of the outside air, it is able to pick up heat and transfer it indoors.
Since Sacramento and the Bay Area experiences mostly mild temperatures throughout the year, heat pumps are an energy-efficient alternative to separate furnace and air conditioner units. While heat pumps can struggle to work efficiently when temperatures dip below freezing, since we mostly experience moderate weather, heat pumps are ideal for homeowners around the Bay Area. Heat pumps generally save homeowners money in areas that don’t experience extreme hot and cold temperatures.
A heat pump is one system that functions as both a heater and air conditioner, saving you space and energy. If you own a furnace and it is nearing the end of its lifespan, consider an energy-efficient heat pump. Since heat pumps are also central air units, they can work seamlessly with your existing ductwork. Keep in mind that there are also ductless mini-split heat pumps which don’t use air ducts. To find out if a heat pump is right for you, get in touch.
If you are a new heat pump owner, you may be surprised that the heat generated by these systems isn’t as strong as the heat generated by furnaces. This is normal. While the heat may not be as intense, heat pumps generally distribute heat more evenly throughout the home.
They will run longer and at a more sustained level, meaning less turning on and off and no more cold/hot spots and strong gusts of air.
Due to the difficulty in extracting heat from very cold outdoor environments, some heat pump owners need a supplemental heating system to feel comfortable. Many people supplement heat pumps with space heaters or some sort of adapted furnace, boiler, or oil burner system. Speak with the heating professionals at Service Champions if you are not receiving enough heat from your heat pump.
If your outdoor condensing unit is iced up, airflow will be severely restricted, resulting in a struggling unit that may end up causing severe damage. If there is light ice, it should go away soon, but if the ice remains for a significant period of time, it’s a problem you want to address quickly.
The most common solution to a frozen heat pump is running the defrost cycle. It normally turns on automatically at timed intervals or when the unit detects frost, however, some systems have a defrost option. The defrost cycle basically reverses the heat pump into air conditioning mode so that it can pump heat to the outdoor unit until it unfreezes. Don’t worry, the defrost cycle only runs for around 10-15 minutes.
Since you don’t want cold air blowing on the coldest of days, many heat pump owners opt for a supplemental heat system. This usually means electric resistance heat strips, which keep the air warm. After around 15 minutes, the heat strips will turn off and the heat pump will come back on.
If you are outside when the heat pump goes into defrost mode and reverses the refrigerant flow, it may sound as if something is wrong with your unit. Don’t worry, it’s just the defrost cycle.
If the defrost cycle isn’t thawing your iced overheat pump, try these steps:
The buildup of ice on your condenser unit is never a good sign. If the solutions above do not work, prevent any further damage to your unit by contacting a professional right away.
It’s possible that too much cold air is getting in the house for the heat pump to keep up. When was the last time you winterized your home? It’s not too late.
Here are some tips for keeping the expensive heat in and cold air out:
Make sure all of your vents are open to allow proper air movement. It’s never a good idea to close vents and registers in the home to try and keep the heat in one area of the home. This “manual zoning” solution may seem smart at the time, but it can create unwanted pressure within the system and cause duct leaks, system failure, and other problems. Your HVAC system, ductwork, and vents/registers have been specifically designed to match your home. Leave them all open, all the time.
If you are feeling cold air blowing from the vents, the heat pump could be in defrost mode (mentioned earlier). This is normal if you don’t have a supplemental heating system, such as heat strips. Defrost cycles normally last around 10-15 minutes and then the heat will kick back on. If you want supplemental heat strips or they aren’t working, don’t hesitate to contact us.