Coleman Heat Pump blowing cold air
Hey all- We have a 2015 Itasca Sunstar (Winnebago Vista) with a Coleman A/C which also functions as a heat pump. When in heat pump mode it frequently...but not always....blows hot for awhile the...
Forum Discussion
When your heatpump is in heating mode, the air conditioning feature is reversed. It removes heat from the outdoor air and puts it inside - just the reverse of what it does in cooling mode. This often causes the outdoor coil on the roof to frost over and block the flow of air. As long as it's above freezing, shutting off the compressor and allowing the fan to continue to run defrosts the outdoor coil. If they wanted to be nice, they'd turn on an electric heating element to temper the air indoors while it's melting the frost.
Heat pumps for the home have two different fans - one indoor and one outdoor. When the outdoor unit frosts up, the outdoor fan stops while the compressor and indoor fan continue operating. The system switches back in air conditioner mode and begins heating the outdoor coil. When it warms enough, it reverses again back into heating mode with both fans running. That's a lot more complex than your RV heatpump where the indoor and outdoor fans have to run at the same time because the motor is common to both.
Heat pumps for the home have two different fans - one indoor and one outdoor. When the outdoor unit frosts up, the outdoor fan stops while the compressor and indoor fan continue operating. The system switches back in air conditioner mode and begins heating the outdoor coil. When it warms enough, it reverses again back into heating mode with both fans running. That's a lot more complex than your RV heatpump where the indoor and outdoor fans have to run at the same time because the motor is common to both.
