Troubleshooting a modine P50A, Noisy and pilot issue


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Old 01-04-23, 07:12 AM
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Troubleshooting a modine P50A, Noisy and pilot issue

Hello group, I have recently acquired and installed a P50A and it worked good for a week or so.
Now it is clicking on startup and shutdown and the pilot has gone out a time or two.
I think the noise is coming from the gas valve but cannot quite tell for sure.

Any ideas would be great thanks.
 
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Old 01-04-23, 02:34 PM
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Welcome to the forums.

My first idea is to replace it. That is an old heater.
Make sure the heat exchanger hasn't rusted thru or you'll be getting a shop full of CO.
Most of those were well rusted at that age.

I believe that's a standing pilot heater which means it uses a thermocouple to keep the pilot lit.
The gas valve is operated by 24v thru a thermostat.

Very little info online. No actual service info. A good thread posted here.
TStat wiring for an old Modine Gas Heater
 
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Old 01-09-23, 11:39 AM
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Thanks Pete,
The heater is actually in really good shape for its age, Which I have yet to figure out what that age actually is. I have recently had my furnace guy check it out for me and he thinks its in great shape. I did figure out that there was a couple of small issues. The thermostat needed a good cleaning, It was making the clicking noise. Also the thermocouple was not sitting in the flame of the pilot and after adjusting its position is working fine now.
If anyone out there has any information on this heater I would really appreciate a copy.
 
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Old 01-10-23, 12:14 AM
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Good deal.
Unfortunately there is almost nothing online for that heater. I've looked several times.
 
 

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