Hi all,
Last week my freezer had frost all over it and the fridge was warm. I figured this to be a classic case of ice building up, so I defrosted the freezer (manually). Since this happens often, I also did a continuity test on the Defrost heater, hoping this was the issue since it’s a simple fix to replace. But no, the Defrost Heater worked great registering a steady 34 Ohms on the multimeter.
Anyway, I put the freezer back together again, assuming that the frost would come back, but at least the fridge would cool off again. No such luck. Now even the freezer isn’t freezing (my ice cubes are all melting).
So what’s next in the debug process?
tx!
adam
— Begin quote from lewiada;516343
Thanks, but is there a way to test this before ordering? I’d hate to spend $45+shipping on part and then find out that it wasn’t the problem.
tx!
adam
— End quote
Adam,
Here is the defrost timer circuits and test procedures.
Being an intermittent problem, I hope something shows up for you.
[FONT=Microsoft Sans Serif][COLOR=#292526][FONT=Microsoft Sans Serif][COLOR=#292526]Disconnect all wires from the timer and attach ohmmeter probes to the terminals specified in the accompanying chart. If no continuity is indicated, the timer is defective.
To Test Turn Timer Knob to Check Between Terminals
Timer Motor Cicuit Leave as is 1 & 3 (black to red)
Defrost Circuit 1st Click 1 & 2 (black to pink)
Compressor Circuit 2nd Click 1 & 4 (black to orange)
You can also run Voltage checks from the timer terminals to chassis ground, if needed to verify power in and out of the timer assembly, then move the the individual components using the same method.[/COLOR][/FONT][/COLOR][/FONT]
the the bi-metal defroster seems to stay on too long. last night it went into defrost mode and the freezer warmed up to about 60 degrees during the 20 minute defrost cycle which occurs every 10 hours. defrost timer has been replaced and is advancing according to the 10 hour cycle.
mfg. indicates that the bi-betal defrost has a is ‘on’ at 25 degrees and off at 50. i do not think it turned off at 50 and therefore the heater stayed on thru almost the whole 2 minute cycle
question: when the bi-metal is working properly and reaches 50 it should turn off the heater even if the 20 minute defrost timer cycle has a few minutes left, yes?
thx pete
Hi.
To prove that your theory is correct replace the defrost thermostat
4387499
Here are the breakdown diagram and http://www.appliancepartspros.com/lower-unit-tube-parts-for-whirlpool-kssp36qfw05.html
Simon.