carrier heat pump gear noise on defrost
#1
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carrier heat pump gear noise on defrost
re: noise (gear grinding?) when carrier 38YXA030 goes into (or comes out of?) defrost cycle
greetings,
after countless calls to carrier complaing about noise we learned that there is a switch on the outdoor unit that has some sort of control over the defrost cycle. Can someone explain what this does, and if there's a risk of causing a freeze-up?
Thanks in advance,
Alan Abrams
greetings,
after countless calls to carrier complaing about noise we learned that there is a switch on the outdoor unit that has some sort of control over the defrost cycle. Can someone explain what this does, and if there's a risk of causing a freeze-up?
Thanks in advance,
Alan Abrams
#2
What you are probably hearing is the reversing valve, which reverses the flow of coolant to enable defrost. Defrost is a noisy (and sometimes steamy) process, you aren't the first to think something is wrong with it.
It's particularlly noisy coming out of defrost, less so going into defrost.
It's particularlly noisy coming out of defrost, less so going into defrost.
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carrier defrost noise / dipswitch #3
thanks Pendragon. we are aware of the noise that is characteristic of defrost. however, it seems like it has been a bigger than average issue with the new carriers; apparently they redesigned their pump recently to address the noise issue.
Now they tell us--if noise is a problem-- to flip "dipswitch number 3" to the reverse position. But I'm having trouble understanding what that is supposed to do.
Cheers,
Alan
Now they tell us--if noise is a problem-- to flip "dipswitch number 3" to the reverse position. But I'm having trouble understanding what that is supposed to do.
Cheers,
Alan