Why is this? When it gets below a specific heat range, in our region - around 35 levels, a high temperature pump manages to lose performance and cannot maintain up with the high temperature reduction of the framework. When the heat range in the home drops around 2 levels below area heat range, additional high temperature comes on to support the high temperature pump. Generally in the kind of electric powered level of resistance heating units.
When it gets to within 1.5 levels of room temperature, the back-up heat cycles off and the heat pump continues running; attempting to reach heat range, but cannot. This generally occurs when the heat range is normally at it's coldest 0 to 30 levels.
This is however, the way heat pumps are designed to operate. Also though they do place out a great deal of high temperature into the home, and they operate for lengthy intervals of period, they are still truly effective.
Therefore, if it is extremely cool away and you desire your home to end up being a specific temperature, you may have got to increase your thermostat simply by 2 levels to maintain it. Today, if it isn't really incredibly frosty out above 35 levels, and your high temperature pump is normally not really preserving heat range, this signifies an issue.
Below is a list of possible causes
- Thermostat not calibrated/not level/faulty
- Low refrigerant charge
- Refrigerant flow-related problem - restriction/bad metering device
- Poor efficiency- needs cleaning and servicing
- Bad reversing valve
- Bad compressor valves
- Compressor not running
- Outdoor unit iced-up
- Snow drift against outdoor unit
- Outdoor unit not running
- Return duct leakage - pulling in cold, unconditioned air
- Open windows/poorly insulated house
