Car Nut for Model Number Amana DRS2660BW Back to trip breaker. Tested the defrost timer and everything was good. There should not be continuity between terminals 1 & 3, correct? Unplugged the heater wire from boths connections and the frig worked in both cycles of defrost timer. With frig warm and in defrost cycle, connected heater wire to defrost thermostat (no current when warm) and other end of heater wire was not connected, frig worked. Unplugged heater wire from defrost thermostat and connected heater wire to other (white wire) connection (current) with frig warm and in defrost cycle and frig tripped breaker. Frig worked in run cycle. Tested heater wire and it is 30.5 ohms. With frig cold and in defrost cycle and heater wire connected to the defrost thermostat only (should have current when cold) frig tripped breaker. Am assuming heater wire is bad since whenever it sees voltage it trips breaker. How can it be tested and will operating the frig without the heater wire damage the frig or any of its components? Thanks for your help.
Answer Hello Car nut. Here is the way to test the defrost timer from the manufacture. If it is good, then there is a shorted wire. If you try to run the unit without the wire, it will not defrost. Hope this helps. Timer motor operates only when freezer control is closed. After specified amount of actual operating time, inner cam in timer throws the contacts from terminal 4, compressor circuit, to terminal 2, defrost thermostat/defrost heater circuit. After specified defrost cycle time, timer cam resets the circuitry through terminal 4 to compressor. 1. To check timer motor winding, check for continuity between terminals 1 and 3 of timer. 2. Depending on rotating position of the cam, terminal 1 of timer is common to both terminal 2, the defrost mode, and terminal 4, the compressor mode. There should never be continuity between terminals 2 and 4. 3. With continuity between terminals 1 and 4, rotate timer knob clockwise until audible click is heard. When the click is heard, reading between terminals 1 and 4 should be infinite and there should be continuity between terminals 1 and 2. 4. Continuing to rotate time knob until a second click is heard should restore circuit between terminals 1 and 4. Read More... Answered by AppliancePartsPros.com | Thursday, July 28, 2011