Mini-split can't keep house warm when it freezes outside
Ductless mini-split heat pump systems often struggle to maintain a comfortable indoor temperature when outdoor temperatures drop below freezing. This leaves homeowners unable to adequately heat their homes on colder days, resulting in indoor and floor air temperatures dropping significantly despite the equipment running.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
- 1Checking temperature by turning the oven off and back on to see the actual reading
- 2Relying on a repair person's assessment or considering appliance replacement
In their words
Unedited, most upvoted first, each linked to the thread it came from.
“My 5 unit / 2 condenser mini split system (Midea white label called Cooper Hunter) put in by the previous owner struggles on colder days.”source ↗
“I can’t really get my house above 66° when the outside temp is < 25°, even with some new windows.”source ↗
“My floor air temp last February was 48°.”source ↗
“The bottom oven will preheat to the appropriate temperature and then, despite the display showing that it's holding the temperature, it will slowly drop over time.”source ↗
Where this came up
People with this problem also raised
- 3Thermostat doesn't work after opening it up
- 9Why does my brand new AC not cool as well as the old one?
- 3Why is my thermostat voltage fluctuating?
- 3Refrigerator stops cooling properly after being moved on its side
- 5How do I use and maintain an oil heating system?
- 2Microwave turns on and rotates but doesn't heat food