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On a hot water boiler you have to jump TT that's why you got the open TT error. What is the brand and model of the LWCO? What do you have for a new burner ignitio control? do you have a multi-meter?
The tt thermostat is connected to the aquastat and through into the back of the 7184b control. No that was only the replacement one I tried it to see if it went into lockout. No tt was not jumped on that one. So that tt error might be that. Then the other error before I put the old one again was low voltage. The original is on there and still has a quick blink then about two or three seconds then a quick blink. Lock out. It has been on there for four or five years. Safegaurd low water cut off (exact as one taken off) and burner control is beckett r7184b.
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