Why is my Heat Pump Freezing up in Summer?
The hottest day in summer isn't when your heat pump stops working. If
you find that it's just as muggy inside as it is outside, chances are your heat
pump isn't working properly, or not at all.
If you check your heat pump and find ice in or around it, then you have
a refrigerated heat pump. But why does your heat pump freeze in the summer?
Because it's so hot outside, you'd think nothing would freeze outside. There
are a few things you can try to get your heat pump working again, but in some
cases you may need to call for repairs.
To prevent your heat pump or air conditioning unit from freezing, be
sure to have it checked and cleaned regularly by a professional heating and
cooling technician. Annual heat pump tuning can save you a lot of money on
What if your heat pump doesn't work?
If you think your heat pump system isn't working, the first thing you
should do is check your thermostat. It may sound silly, but many people
accidentally turn on only the fan and not the cold air, or their thermostat
If you confirm this is not the case, go outside and check the heat pump.
If you find a chunk of ice in or around the unit, you have a refrigerated heat
pump. Try running a defrost cycle to melt the ice. Heat pumps have a defrost
cycle to keep them from freezing in winter, but sometimes this cycle is helpful
in this situation.
Once the ice melts, try running it again and go back inside to see if
you feel cold air coming out of the vents. If things seem to be getting better,
keep an eye on your heat pump to make sure it doesn't start freezing again. If
you've melted the ice and your heat pump is still not working, there are a few
other things you can try, but you should be prepared to call a professional for
heat pump repair.
Why does your heat pump freeze in the summer?
As you wait for the HVAC technician to arrive, you may be wondering,
"Why is my heat pump freezing in the summer? It should be hot, not
cold!" Cold refrigerant absorbs heat to cool your home. When warm air hits
the coil, condensation forms. If the coil is too cold, the condensate can
freeze, causing your heat pump to "freeze" in the summer.
How did my heat pump coil get too cold?
1. The coil is too dirty
The more dirt builds up on the coil, the more it insulates it from the
warm air blowing over it. A nice layer of dirt will help make your coils cool.
Avoid this problem by regularly changing the air filter and professionally
cleaning the coil from time to time.
2. Your system has poor airflow
A dirty air filter, a clogged return vent, or a malfunctioning blower
can all be the cause of insufficient airflow. And, again, the lack of warm air
blowing over the coil can cause it to freeze.
3. Insufficient heat pump refrigerant
When there is insufficient refrigerant, the system pressure drops, which
can cause the coils to become colder than usual. This is the most common source
of cryo coils.
Contact us if your heat pump freezes in summer. Our licensed HVAC
technicians will help you diagnose problems with your heat pump. We want to get
your home back to a cool, comfortable temperature as quickly as possible.