Outdoor unit humming for a long time before indoor blower startrs
#1
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Outdoor unit humming for a long time before indoor blower startrs
I have a Trane XL 1200 heat pump. Recently, the outdoor unit will start humming for several minutes before indoor blower starts. I don’t recall this as a normal behavior, or at least it would not do it for that long. Is this the indication of Freon being low, or other problems?
#2
The compressor could be setup to start supplying heat before the blower starts.
The real question is..... define humming ?
Is the compressor and fan running or do you just hear a hum and nothing is running ?
The real question is..... define humming ?
Is the compressor and fan running or do you just hear a hum and nothing is running ?
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Thanks for reply. Yes, the outdoor unit actually started. I don't remember it would be running for so long (several minutes) before the indoor blower starts though.
#4
My forum partner knows the Trane units better than I do but it sounds like it's acting normally. It takes a few minutes for the heat pump to build up some heat so the blower being delayed could be normal so as to not blow cold air inside.