ClFrank13
New Member
I have a Slantfin Sentinel SE 140 (gas boiler) with a Honeywell L8148E 1273 aquastat that I had no issues with sine installed 15 year ago.
My system has 2 zones, in one of my heating zones when there is a call for heat it intermittently fails to fire up the boiler - if that zone does fail, the zone valve opens but the boiler wont fire up unless I do a power cycle to the boiler or lower the temperature on the thermostat below the set point and then raise it back up. This only happens in that one zone - the two zones share the same circulator pump and the circulator pump won't kick on either if that zone fails (unless the other zone id cal;ling for heat).
After doing some research, I understand this specific aquastat is very flaky - and figured I start by replacing that but since it only happens in the one zone intermittently, I am curious if anyone has suggestions on what else to look for. I verified it s not the thermostat because I switched the stats to the two zones and the problem stays with the same zone.
Thanks in advance
Cliff
My system has 2 zones, in one of my heating zones when there is a call for heat it intermittently fails to fire up the boiler - if that zone does fail, the zone valve opens but the boiler wont fire up unless I do a power cycle to the boiler or lower the temperature on the thermostat below the set point and then raise it back up. This only happens in that one zone - the two zones share the same circulator pump and the circulator pump won't kick on either if that zone fails (unless the other zone id cal;ling for heat).
After doing some research, I understand this specific aquastat is very flaky - and figured I start by replacing that but since it only happens in the one zone intermittently, I am curious if anyone has suggestions on what else to look for. I verified it s not the thermostat because I switched the stats to the two zones and the problem stays with the same zone.
Thanks in advance
Cliff