I'm trying to help my brother out. His house has two HVAC units one serves the lower floors and one serves the upper floor. They are identical Whirlpool models circa 1985.
The units failed to cool about a year apart from each other so this is an old problem.
The heating portion of both units works flawlessly.
When cool is selected and the temp is set below ambient the blower comes on but there is no sound what-so-ever from the compressor units located out back. These units have two motors each. One turns the fan while the other turns the compressor and neither unit's motors make any noise. I pulled the capacitors and tested them and they were within spec. I doubted myself and took them to a shop and they verified that although their cases were encrusted with rust they were within spec. I did not see any evidence of ot taletell sign of electrical arcing or melted wires etc.
One of the units was serviced by a pro two years ago and received a new compressor.
What I need is a guide. I would like a diagnostic map to follow to pinpoint the problem to attempt a DIY repair.
Thanks for reading my post.
The units failed to cool about a year apart from each other so this is an old problem.
The heating portion of both units works flawlessly.
When cool is selected and the temp is set below ambient the blower comes on but there is no sound what-so-ever from the compressor units located out back. These units have two motors each. One turns the fan while the other turns the compressor and neither unit's motors make any noise. I pulled the capacitors and tested them and they were within spec. I doubted myself and took them to a shop and they verified that although their cases were encrusted with rust they were within spec. I did not see any evidence of ot taletell sign of electrical arcing or melted wires etc.
One of the units was serviced by a pro two years ago and received a new compressor.
What I need is a guide. I would like a diagnostic map to follow to pinpoint the problem to attempt a DIY repair.
Thanks for reading my post.