Hi. Bought our house this past July. The heater - Mastertemp 400 - worked fine. We used it at least once per month through November. At one point - I think in August - Error 01 (Thermistor) was a problem. I replaced that, but later found the real problem was the connector on the control board. Cleaned that up and it's been fine.
Tried the heater a couple of days ago. It goes through the normal display cycle 128, r=8,..., current water temp - which is 41F. Fan runs. Unit fires up. Stack...
Mastertemp 400 control board dead?
Tried the heater a couple of days ago. It goes through the normal display cycle 128, r=8,..., current water temp - which is 41F. Fan runs. Unit fires up. Stack...
Mastertemp 400 control board dead?
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