Have you ever seen ice or frost on your Heat Pump in the Winter? This can often be normal to see from time to time. Your heat pump is designed to extract heat from outside and transfer it inside. As it pulls heat from outside, moisture will collect on the coils. If the exterior temperature is below freezing then frost and/ or ice will collect.
Normal frost or ice at times is not a concern. At programmed intervals your unit will go into a defrost mode and will melt the frost or ice. Normally your unit can defrost at 30, 60 or even 90 minute intervals.
During defrost mode your unit will sound louder. Some units can be noticeably louder. In defrost mode, the coils will heat up to almost 60 degrees in order to melt the frost or ice.
The colder the weather the longer duration your heat pump will run. Unlike a furnace, which heats the air, your heat pump actually transfers heat. This extraction/ transfer operation requires nearly constant operation in very low temperatures. Your heat pump is designed to operate that way.
There are several icing problems which may indicate a problem. Some problems with over icing and not defrosting are:• Faulty controls- There are many controls, relays and sensors utilized by your system. A failure of any of these components can cause your system to not operate properly. A sensor failure can cause your system not to defrost.
These problems will necessitate a professional HVAC technician to assess the issue. Contact Air Doctor Heating and Air for a complete assessment and any necessary repairs or service.