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Can you give me th part number of the defrost timer you have fitted please
OK are you happy to do a couple of tests for me, I will need you to access the evaporator and also have access to the defrost timer?
OK no hurry
OK can you get at the front of the defrost timer ?
I need you to manually turn the defrost timer using the main shaft nut
OK I dont wish to teach you how to suck eggs but do you understand the principle of the defrost timer?
OK excellent, to expand it abit, the compressor comes on (its operation being controlled by the thermostat or whatever electronic device is measuring the temperature) at the same time power is supplied to the defrost timers clock motor. After a period of compressor run time (note not time but compressor run time) the switches on the defrost timer switch off the compressor and switch on a heater in the evaportator. There follows a period, usually 20 sometimes 30 minutes of heater operation. There is however what is known as a defrost termination stat that can terminate the heater and switch back on the compressor. So can I assume that the compressor is running and you have a cold evaporator, if not can you switch the freezer on and let if run for afew mins.
OK without electrocuting yourself can you turn the defrost timer knob (lets call it that) click by click and tell me if the compressor goes off and the heater comes on - not the timer will only turn in one direction !!
Thats fine just keep the thermostat turned to to max cold for the time being
OK turn it slowly again and when the compressor goes off check that the heater has come on? Leave the compressor off for th the time being. Have you got a multimeter?
Heater on? Multimeter?
Are you on volts ac and checking across each ends of the heater ie you have two wires going to the heater and you have 120 volts across the connectors?
See the attached diagram - http://www.partselect.com/Models/EEV203NW0/Sections/UNIT/?ModelID=607035&ModelNum=EEV203NW0&mfgModelNum=&ManufactureID=&Selected=FYMZ1YR0&Position=9&mfg=Whirlpool&Type=Washer&Mark=9 -- items 43 defrost heater, item 27 defrost drain heater and item 37 defrost termination stat.--
if the compressor is back on the heaters should have gone off. Can you with power off check the defrost thermination thermostat - and tell me if you have got continuity through it at room temperature?
If you have a look on the side of the defrost termination stat you should have a couple of number starting with L which may be something like L70 22F or something close to it.
Defrost termination stat should be clipped to the top of the evaporator?
OK disconnect it - get yourself a glass of water with afew ice cubes in it and do a test for me - come back to me when your good to go.
Has your multimeter got a beeper?
OK with the multimeter on ohms what reading do you get with the probes apart?
ok if you put one probe on each wire of the defrost stat at room temperature you should also get zero?
OK put the metal can end in the iced water, you should hear it click and then you should get a reading ?
OK well the way that a L70 58F works is that at 70f it is open circuit heater go off and at 58f it has continuity compressor comes back on. We seem to have found your problem - without the closed circuit the compressor wont come back on. So all you end up doing he cooking everything as the defrost period doesnt get terminated.
OK I have to head off to pick my daughter up. In the meantime, join the two defrost cables together if you can (ie leave the defrost stats out and just joint the cables together and let the freezer run without them. I will come back to you in afew hours and hopefully the freezer will still be freezing and op0erating on the defrost timer. But put the new defrost timer in place of the old one.
OK when you are good to go com back to me and we can continue
OK I'm in and out at the moment but I am somewhat concerned that the supplied defrost stat has a 28 degree diference to th original and we may have to reinstate that and perhaps even remove it from the circuit to see if that works. The issue is that the defrost action does not stop after the cycle is completed - Can you give me an idea of how long the defrost timer stays on heater on? I have had these replacement timers where the connection to the compressor and the heater have been incorrectly wired with heater on for longer than compressor.
yes that OK - if you miss me tonight Im at work tomorrow too so just drop in.
Can you just check for something if you would, if you bypass the defrost stat and switch on does the evaportator fan come on immediately?
No I dont think so, the fact that the compressor is able to get the temperature down to where we want it means that it at least is working, its a control problem - have Whirlpool advised what temperatures their replacement defrost stat works at?
OK we are back to what we started with - I still think it is the defrost termination stat so once you get the new one in we can be sure. Sorry the hours are all over the place, I work for Whirlpool but Im based in the UK at the moment so you are usually between 5 and 8 hours behind me. Ships passing in the night so to speak. We link in if we are both around my afternoon evening and your morning.