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Power Cut - Heat Pump Evaporator Iced Up

 
Air Source Heat Pumps (ASHPs)
Last Post by trebor12345 6 months ago
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trebor12345
 trebor12345
(@trebor12345)
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Joined: 2 years ago
Posts: 152
Topic starter 21/11/2025 9:42 pm   [#2616]

We have just had a power cut and 1 hour later power was restored.  The heat pump powered up again and after 30 minutes I became nervous that the evaporator was at -20C, hardly any air flow across the evaporator, so I have shut it down for the rest of the evening.

How do you deal with the above situation and a iced up evaporator?

What would of happened if I had let it run in this iced up situation?

Did I do the right thing by turning off, or should I have let it run?

Thank you for your feedback.

BTW, R32 refrigerant.


This topic was modified 6 months ago 2 times by trebor12345

2024 build bungalow, Southern England, 179 m2, 14w/m2
Underfloor heating, fully open
From the 26 May 2026
Vaillant aroTHERM plus 3.5kW
50 litre volumiser
3.6KW solar panels


   
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