This unit looks brand new and purportedly did not get much use was just used in a model home. Anyway, it also does not cool.
I’ve done the following:
- measured resistance on the pins on compressor C-R 14.1; C-S 14.7; RS 29 ohms
- looked at the PTC thermistor relay, opened it up even… there was only minor discoloration (from heat?) in one area, but components all looked clean and no carbon etc. Shaking it made only the slightest sound, didn’t sound like I’ve heard on youtube vids… seems to me only the sound of the contacts moving slightly in the case (i.e. what connects to pins)
- 120v is coming through the leads to the PTC relay connector
- Measured 122v on EACH side of the PTC relay connectors C-R and C-S; from what I’d gleaned online was expecting only to have 120v on the C-S side?
- PTC makes a click sound at some point, presumably on heat up and cool down. The unit that the C runs through gets very hot… I presume this is the temperature relay component? There is a conductive disk that is suspended between the contacts for the R and S sides… not sure what this does would like to know. Also, I am not sure I replaced it in same orientation if it is directional.
- Compressor will run, but maybe not always. Left it for a couple of hours running and it did not cool at all. At same time I started a regular full size fridge from warm and it got quite cold in the same timeframe. The bent copper pipe from the compressor was NOT cold on the wine cellar, but the fridge it was. Compressor on wine cellar was quite hot. When I plugged it back in after stopping it compressor did not come on right away, not sure if that is normal or not.
So… does this sound like a Freon charge issue? Or could it be related to the PTC relay in some way?
Are we expecting it to give 120v on both sets of pins C-R and C-S simultaneously?
What other tests can I perform?
This looks like the correct PTC replacement Whirlpool 4344776 Start-Dev - AppliancePartsPros.com