Recent content by hambone

Thanks for the reply. I believe my issue was the PCB board. Somehow the probes must have provided a resistance through my multimeter and provided readings that the board accepted temporarily. When I finally could get a keypad functioning the stack flue temp was reading zero (others...

I’ve got a weird one. Like the title says, I Mastertemp NG 400 that threw the E05 and first step was to replace SFS. I confirmed it was bad and got a new one but still got the E05. I had issues with the switch membrane buttons not working so I ordered a new one. While waiting for the...

Update - in case someone else goes down this journey. I finally determined that I was not getting any flame signal from the igniter to the Fenway and it was likely due to grounding issues (or lack of ground) related to the rust or repair of rust on the lid. I finally found a used lid and...

Thanks for this. I dont know whats going on, but the heater ran f

Thanks for the detailed responses. I am really trying to understand which sensor is shutting down to get an idea of what is going on. The manual is great to show why an error occurs, but i guess I need to research the nuances of what is being monitored and triggered in “non-tripping” an error...

That is a relief. I will check that out. What to look at in particular? Bypass valve? There didnt seem to be anything you could get wrong or backwards.

Just tried without thermal regulator in, now it runs for 25 sec on then 30 off…. Which is better in that it is heating (was 78 earlier and is now 82) in time for teenagers prom party tonight.

Yes, new thermal regulator (tested it in my sink ) and the bypass valve also new (came with exchanger). I also ran pool without filter and at various flows with the variable speed pump. I also tried jumping each of the devices on the manifold individually as well as the airflow gauge - each...

Yes, i put the new igniter in- it came with the heat exchanger. On the Fenwall FC leads, it tests it reads around 10 uA dc while hot. The old igniter was lower. This morning i took the thing apart and ran a ground wire from the burner bolts under the blower, the blower bolt, then to the...

Need help diagnosing. Long story… My mastertemp 400 sprung a leak in the exchanger about 2 years ago. I patched it with JBweld and it held until a week ago when my heater stopped working as the patch failed. I bought a new heat exchanger, and when I went to replace it, noticed the combustion...