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I have replaced the stack flu sensor several times, I did get the first one to work for a day but now the board isn’t getting a reading and heater shuts down Starts and heats and then shuts down… Reading is always 80. Before I replace the board has anyone discovered another cause? I don’t...

Okay. I will do that. Thank You Todd

So before I got a chance to check, I thought I’d try to fire it up and like before it fired right up and stayed lit ? Which is great but I don’t think I’ve solved the issue yet...thrilled it’s working but really want to know what’s causing the issue. It seems and might be coincidental, that...

I believe 3 times it will fire up for about 5 seconds and stop and try again. I don’t have a “true rms’ multimeter unfortunately...is it possible for the heater to have worked after having the same problem if the Fenwal is bad? (Had the same issue then it worked and now it doesn’t again) I was...

Hi, I replaced the manifold bypass and thermal regulator a few weeks ago and didn’t have any water coming out; here is a picture of the model and serial number. Thank You, Todd

I really appreciate the replies. Thank You I replaced the ignitor a few weeks ago so I will run the test on the module...I thought it might be bad so I was going to replace it but then the heater worked great... then stopped...same code before as before I got it to stay lit, so I thought maybe...

Hi, my heater is firing up, heats for 5 seconds and after several tries it stops and get the 3 blinks indicating “Ignition Lockout” I just replaced the thermal Regulator, Main Control Board, the ignitor, stack flue sensor and manifold bypass...was getting ready to replace ignition module but I...