Blackbird
25-06-2008, 07:44 AM
Hi,
I got called out to a Mr Slim Puh-5YK for a ductwork problem and I noticed a rattling coming from the outdoor unit.
I removed the covers and noted that liquid refrigerant was flooding back to the compressor causing this "death rattle". I put the gauges on the high side (only access on heating) and head pressures were very low & the outdoor fans seemed to be stuck on low speed causing the floodback.
There are two high pressure switches one for safety and the other for control (fan control on heating, I presume) Both switches have a resistance of 0 ohms which seems correct.
To me this looks like a outdoor control card fault - but I am always very cautious when replacing these things and like conformation.
Anybody else have any ideas/opinions?
cheers
I got called out to a Mr Slim Puh-5YK for a ductwork problem and I noticed a rattling coming from the outdoor unit.
I removed the covers and noted that liquid refrigerant was flooding back to the compressor causing this "death rattle". I put the gauges on the high side (only access on heating) and head pressures were very low & the outdoor fans seemed to be stuck on low speed causing the floodback.
There are two high pressure switches one for safety and the other for control (fan control on heating, I presume) Both switches have a resistance of 0 ohms which seems correct.
To me this looks like a outdoor control card fault - but I am always very cautious when replacing these things and like conformation.
Anybody else have any ideas/opinions?
cheers