Author Topic: Vintage 1950's Hotpoint Relay/ overload  (Read 4459 times)

Offline PRM

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Vintage 1950's Hotpoint Relay/ overload
« on: February 14, 2012, 09:54:15 AM »

I am only able to cool my vintage Hotpoint Kegorator  about five degrees (see pic below I made this about a year ago).  After some research online I have pin pointed the problem to the relay.  The relay has a loose part in it that is noticed when shaking the relay.
So it looks like I am looking for a replacement relay for my 1950's (I do not know the model year that this piont) vintage hotpoint fridge


Specs on the frdige are:
Serial No. 0656521
Catalog No. 226EH12
1/5HP 3.3 AMP


The relay is made my Ranco with the following information stamped on it:
H-65-6516
LH2B4H1


See below for pics of the compressor and relay


At the recommendations of an antique repair shot I contacted the appliance repair clinic yesterday and they did not have the part but provided the following two part numbers from a microfiche
104983 and cross reference Part No. WR7X5005

Afters some online research I found that these numbers cross referance too the following parts:

Mars 21305
Supco R081
GEM IC15
Smart Relay SR015

Sorry for the long winded background....my questions are:

  • Am i on the correct track with these part numbers?
  • Will these replacements parts (have located a few for less them $30 a piece) be able to plug into the existing setup?
  • What caused these relays to go bad?  (i.e. is my compressor going bad)
Thanks in advance for your help....I love this fridge and it has been in the family since it was made in the 1950's and I hope to get it back in running shape ASAP!

Thanks again- Paul

Offline tgoods

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Re: Vintage 1950's Hotpoint Relay/ overload
« Reply #1 on: February 14, 2012, 10:26:27 AM »
Does the compressor run?  It's normal for older relays to rattle when you shake them.  Test with an ohm meter.  The start and run terminals should have infinite ohms when right side up and 0 ohms when upside down.  Check your compressor terminals.  Top terminal is common, right is run, left is start.  Check from common to run, common to start and run to start.  Typically, the start winding has more resistance than the run winding.  The start to run winding measurement should equal both common measurements added together. Check all terminals to ground, should be infinite. Any of the generic relays should work.

Offline bigbuck

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Re: Vintage 1950's Hotpoint Relay/ overload
« Reply #2 on: February 14, 2012, 10:29:32 AM »
 Man that's a nice refrigerator, anyone of those parts will work, you may have to wire it in though. Compressor terminals look good
 


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Offline PRM

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Re: Vintage 1950's Hotpoint Relay/ overload
« Reply #3 on: February 18, 2012, 09:51:56 AM »
Ok i have done some more testing and here is an update:


I decided to use the existing relay and use my build in internal temp gauge to run a test.  Here is the results


Time (mins)    Internal Temp (degrees F)

Offline PRM

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Re: Vintage 1950's Hotpoint Relay/ overload
« Reply #4 on: February 18, 2012, 09:55:22 AM »
Time (mins)    Internal Temp (degrees F)
0                         42.5           
20                        32.0
30                        29.7
40                         30.1
50                          33.3  and compressor no longer running


Any reason why after approx. 50 mins the compressor is no longer running.  I unplugged the fridge and after a few mins plugged it in and the compressor ran fine.


I also tested the resistance and it appears to be fine.  Again thanks for your help!

Offline theoldstoveguy

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Re: Vintage 1950's Hotpoint Relay/ overload
« Reply #5 on: February 18, 2012, 06:06:44 PM »
 Where are you reading the temperature? The fresh food @ 38 F is perfect. To check it put a thermometer in a glass of water. The old units ran 50/50 usually.

Offline PRM

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Re: Vintage 1950's Hotpoint Relay/ overload
« Reply #6 on: February 19, 2012, 12:53:10 PM »
Yes i am reading the temperature using a probe that is inside the fridge.  I tested it again today and after about another hour the fridge temperature is no longer maintained (i.e. matches the outside temp).


What do you all think could cause the fridge to maintain cooling for about an hour at a time and then stop working?


Thanks!

Offline jumptrout51

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Re: Vintage 1950's Hotpoint Relay/ overload
« Reply #7 on: February 19, 2012, 02:34:19 PM »
Check for 120 volts at the relay when it is off.
If no voltage check the cold control it may be sticking open.
Take a Kid fishing.

Offline PRM

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Re: Vintage 1950's Hotpoint Relay/ overload
« Reply #8 on: February 20, 2012, 05:16:38 PM »
Been running the fridge for about a day now and only getting about 3 to 5 degrees cooling (around 45 degrees inside the fridge).  I have check the relay regularly and it always has 120 Volts.


What would be causing the compressor to run and not reach the full cooling power?


Again thanks everyone for your suggestions and time!

Offline jumptrout51

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Re: Vintage 1950's Hotpoint Relay/ overload
« Reply #9 on: February 20, 2012, 06:35:38 PM »
Weak compressor and or low on refrigerant.
Take a Kid fishing.

 

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