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no-cap fridges

D

David Lesher

Jan 1, 1970
0
I'm helping a friend fix a fridge remotely. The compressor
tried but won't start.

I suggested he check continuity on the run and start windings, the
starting relay, and the starting cap. Ooops, it has none!

<http://sendspace.com/file/emdg1e>
<http://sendspace.com/file/ckpnaw>

It's been 20 years since I took Machines, but I got an A. [And the
fridge is not much younger...] But I don't recall any capacitor-less
single-phase AC motors with good starting torque.

What gives?
 
D

David Lesher

Jan 1, 1970
0
Beware of friends bearing broken devices.
yep...
Are you getting a clicking sound (i.e. overcurrent shutoff) or a
grinding sound (loss of lube)? Did this happen just after he moved
the fridge (broke loose the crud at the bottom of the compressor)?

It's cycling on overcurrent.
Been there for 10+ years.

It's labeled "PTC Relay" on the schematic. Depending on the model,
you might get lucky and find that it's removable.

It is. But there's no cap.
You get an "F" for this posting. Asking a repair question without
supplying the manufactory and model number is a capital crime. Turn
in your deploma and slap yourself on the wrist with a wooden ruler.

GE Hotpoint CTX18BACGRWW.
<http://www.appliancepartspros.com/p...model_id=205542&diagram_id=21197026#d21197026>

But the print shows all we know...
Also, while there may be some electronics inside a fridge, methinks
that one of the appliance repair forums or newsgroups might be a more
appropriate place to ask your question.

The people here are far smarter.....
 
B

Bob Larter

Jan 1, 1970
0
Jeff said:
Nope. Just mention something political and watch the average IQ drop
dramatically.

Let's not go there...
 
M

Mark Zenier

Jan 1, 1970
0
Yea, I'm three weeks behind so shoot me.


It's probably inside the compressor case.

....
Thanks. The diagram shows that the relay is replaceable. However, I
doubt that's the problem. It might be that the overload sensor is
tripping too early. Tear the relay and overload assembly apart, clean
all the junk out, clean the contacts, and look for damage. You might
get lucky.

A PTC relay is solid state, like the degauss posistor in a CRT TV set.

I fixed a 20+ year old Whirlpool with a bad overload. The repair
consisted of taking out the start relay (bouncing armature type) and the
bi-metal click disk overload switch, and gluing a GE brand PTC relay on
the side of the compressor with silicone glop and tie-wraps. (It includes
the overload function). Three wires: 1) power in from the main thermostat
and/or defrost timer, 2) start and 3) run wires to the compressor.

Mark Zenier [email protected]
Googleproofaddress(account:mzenier provider:eskimo domain:com)
 
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