Refrigerator and freezer not cooling

My whirlpool refrigerator/freezer for about the last year has had intermittent operation. it would work fine for a while then stop working then start working again. lately if I jiggled the thermostat the compressor would come on for a while then shut off. now it has stopped working altogether. I tried jumping across the two wires on the thermostat to see if I could get the compressor to turn on but had no success with that. any ideas? I know nothing about appliance repair.

Here are your parts
Parts for Whirlpool ET1PHKXPQ01 Refrigerator - AppliancePartsPros.com

See the attachment for the tech sheet.

Do the condenser/compressor fan and the evaporator/freezer fan run?

If yes then it could be compressor or it’s start device problem.

If No then it could be a defrost timer problem.
ET1PHK.pdf (501.1 KB)