Heater shutting down after two minutes
- Thread starter Paul34787
- Start date
Maybe a bad board, bad wiring or bad sensor.
If you have replaced the sensor and the board, then that leaves the wiring.
Check the voltage across the sensor with the wires connected.
Check the voltage at the wires with the wires disconnected.
Maybe you got a bad sensor.
If you used Amazon, then the sensor is highly likely to be bad if it was a generic sensor from China.
Yes most items were from Amazon. Board, bypass, thermal regulator, all senors.
Yes I just put a second bypass in yesterday and the bolt was threaded incorrectly. So I removed it and still won't go in correctly. So I did not want to force it. All other bolts sit well and tight. It is water tight so didn't want to push my luck by snapping it. Gaskets are flush as well.
Voltage is 0.04 while starting and goes to 2 after ignition. When disconnected it is zero and unit imediately turns off when disconnected.
The voltage should be 0 indicating that the sensor is closed.
If the sensor opens, the voltage should go to 24 volts AC.
If the sensor opens, the voltage should go to 24 volts AC.
7 feet. It has worked fine for many years at this distance.
Well that was the best advice. Didn't believe a new things are not tested properly. Will not buy anymore parts from Amazon. Changed the PC Board to the old one and the unit now works perfectly. This has been so frustrating and I have given up for weeks at a time. Want to thank you for all your recommendations which have been spot on. Believe I had a bad bypass to begin with but changed all the parts and ended up with a defective board. Old board fuctiong just fine. Thanks again.
Yes exactly. Changed every part before removing the manifold (well because I am an amateur and that to me was a "big job"). So finally changed the bypass which was rather easy but in the process updated all the easy fixes board, sensors, gas manifold (which I broke by tapping it with a hammer), ignitor (which I also damaged). Once everything back together still had errors. Turned out was defective board and replaced with old board and it worked. Spent about the same as paying a professional to just change bypass.
