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Ice buildup under heat pump

Posted: Mon Dec 01, 2025 11:05 am
by ldsuhr
I am looking for recommendations for how those of you with ducted heat pumps manage the ice buildup that happens from condensation UNDER the heat pump. Last winter, we carefully chiseled ice out of the way, but it was awkward, cold, and dangerous to the machine. What else have you done to combat this problem? Thanks in advance!!!

Re: Ice buildup under heat pump

Posted: Mon Dec 01, 2025 6:50 pm
by Reapward
We put down a thick rubber strip, at a slant, with concrete blocks (don't know the why of the blocks) on top of that, to help guide any melted water away from it. It still gets ice but not a large amount. And ours is not ducted, so don't know if that makes a difference.
That's about it.

Re: Ice buildup under heat pump

Posted: Tue Dec 02, 2025 2:01 pm
by solarcold
It is defrost cycle water, slope away, may need to clear manually as you have done occasionally

Re: Ice buildup under heat pump

Posted: Wed Dec 03, 2025 8:06 am
by ldsuhr
Thanks Reapward and solarcold! Let me see what I can create in this small space. I wonder if there is just more defrost action going on as it is a ducted heatpump, not ductless. Maybe just need more slope?

Re: Ice buildup under heat pump

Posted: Wed Dec 03, 2025 8:51 am
by solarcold
It is really no different for ducted or mini split. A hand held heat blower may be useful use with caution

Re: Ice buildup under heat pump

Posted: Wed Dec 03, 2025 10:08 am
by BenW
My mini splits also do this too. A few times a winter I break up the ice with a rotatory hammer or pick axe