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Thread: Hissing ASHP
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24-02-2017, 01:37 PM #1
Hissing ASHP
Recently my ASHP has started to hiss when it starts up and expels warm moist air (my glasses steamed up) before running cold after a few minutes.
I've never noticed it hiss or expel warm air - is this normal or is something going wrong with the heat pump?