Won't hold Temperature Prochem 405

randywlo

New Member
Nov 24, 2021
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Randy looney
I am a newbie just bought a used van with a prochem performer 405, I'm having trouble with it holding temperature. I replaced the bypass solenoid and as soon as start it up it's bypassing water even cold, I unplugged the wire and it stopped. it heats up but as soon as now but as soon as I start using it the temp drops. I'm not sure where to go from here, I have only been in business a few weeks any help would be appreciated
 
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