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Heatmaker H-series locks out
Hello I have a Heatmaker H-series gas boiler that locks out<span style="color:#2200c1"><span style="text-decoration:underline;"> occasionally</span><span style="color:#000000"> </span>
especially when it gets cold out, Its natural gas supplied and heat only,</span>
<span style="color:#2200c1">Its been fine until last night when the temparture was in the single digits, I shut the boiler off for a bit, changed the igniter because I had a spare, the igniter was fine but what the heck, then turned it back on and it worked ok until sometime in the middle of the night, then it locked out again, Get up at 5 this morning shut the power off turn it on, I guess that resets the lockout and so far its hasn't lockout yet, One more thing I changed out the expansion tank last spring and bleed the system but I have to admit I just checked the tank and there isn't any water in the top of the tank when I tapped it with a coin. Any thoughts or ideas would be greatly appreciated, I tried calling a couple of service men today to come over but they are too busy today.</span>
<span style="color:#2200c1">Thank David</span>