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Empire rh 35-7. Won't turn off when it reaches temp

So it starts up perfectly it lights it reaches temp and the thermostat kicks in to turn it off but the little box just buzzes and never actually turns off so it effectively just stays on while buzzing once it reaches temp and goes above temp. I can test the thermostat just by going back and forth past the current temperature if I go above the current temperature it's quiet and just stays on I go below the current temperature the buzzing kicks in like it's trying to turn off the valve but nothing happens it just stays lit. It sounds like a little magnetic relay is just buzzing in there for what I can tell it's probably like part of the electronic fuel valve I'm guessing. Problem is I have to fix it I can't order a part it's literally impossible at our location to replace a part so I have to fix what's here. Any ideas?

Posted by ChaotykOriginals on

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It sounds like the electronic fuel valve might be malfunctioning and not shutting off properly, which could be causing the buzzing sound you're hearing. Here are a few things you can try to fix the issue:

  1. Check the wiring: Make sure all the wires going to the valve are connected properly and securely. Loose or damaged wires can cause electrical problems.
  2. Clean the valve: Over time, the valve can become clogged with debris, which can interfere with its operation. Try cleaning the valve by disconnecting it and blowing compressed air through it to remove any dirt or debris.
  3. Replace the valve spring: The spring inside the valve that controls its operation can become weak or damaged, which can prevent it from closing properly. You might be able to replace the spring to fix the issue.
  4. Check the control board: The problem could also be with the control board that regulates the valve's operation. Check the board for any obvious signs of damage or malfunction, such as burned-out components or loose connections.
  5. Call for professional help: If none of the above steps work, it might be time to call in a professional HVAC technician to diagnose and repair the issue. They can help you identify the exact cause of the problem and recommend the best course of action to fix it.

Posted on Feb 23, 2023


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