In article ,
>
> hr(bob) snipped-for-privacy@att.net wrote:
> >After I commented on a freezer post last week, my ancient Sears
> >Coldspot freezer has been acting up. Before I unload everything so
> >that I can move it, and hopefully find a wiring diagram on the back, I
> >would like a generic wiring diagram so I can see what possible
> >connections might be. I can get to the defrost timer on the front
> >lower panel, and plan on checking it out, but also curious what other
> >connections might be.
>
> >It doesn't have to be a Sears freezer, any old wiring diagram that
> >includes a defrost thermostat would be appreciated. It would help to
> >confirm what I am expecting.
>
> Is it frost free? On a Whirlpool refrig., the defrost thermostat is a
> high temperature (70 degrees F) cutout. I assume only comes into effect
> when things are out of whack. It's in series with the defrost heater,
> clipped to one of the brackets that hold the evaporator coils.
>
> You should be able to ohm out the heater+defrost circuit at the timer
> if the guts are buried down in a hard to get place.
>
> Mark Zenier snipped-for-privacy@eskimo.com
> Googleproofaddress(account:mzenier provider:eskimo domain:com)
Thanks to all commenters.
I finally got enough stuff out of the freezer to be abe to moce it, it was in an alcove and really miserable to move on a carpeted floor after 20 years in the same position.
Anyway, I was finally able to catch the unit at a temperature of 30 degrees with the timer in the run position, not the defrost position, and the compressor not running. A tap on the thermostat and the compressor started right up and took the temperature down to zero over several hours. So, the problem is surely the thermostat. Now I want to wait until I can move some more of the food out and then replace the thermostat if I can't get at the contacts to polish them. Them a lot of careful monitoring to make sure everything is really ok. I will also replace the timer on general principles, it is at least 25 years old and for $25.00 my local parts store has a replacement. Even if the new unit is mostly plastic, I feel better with a new timer.
Thanks again for suggestions, etc.
H. R.(Bob) Hofmann