Question about Air Conditioners
It has been explained to us that the thumping (sounds like a small tom-tom) is to be expected when the unit is defrosting. Now that we've hit the 30 degree mark this is happening every night.
The problem is the noise. Last night I was awoken at 4:30 and again at 5:45 (we have two units- not sure of the culprit). I can understand the need for the cycle, but I can't believe it was designed to be so noisy it would wake you up! The units are outside at ground level, free standing house; bedroom is on 2nd story, same wall as heat pumps.
Is this normal? or is there a fix?
The heat pump works like this. Your outdoor units are now your evaporator, meaning that now they get cold, they will build a layer of ice and they will need to go thru a defrost cycle, either iniated by time or temp. When the cycle starts your system actualy switches back into cooling, turns off your outdoor fan, and brings on your heat strip. The noise you hear is either you reversing valve switching or the ice being melted, then being sucked back into the fan when your unit switches back into the heat mode.
Posted on Nov 17, 2007
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