| Aquastat/Gas Valve Not Talking To Boiler?
Howdy, I've got a Burnham P-204 -W forced hot water boiler that's been giving me problems. I started it up for the first time this season & right away I knew I needed a new thermocoupling. No sweat. I swapped it out, fired her up & I thought that was that. I used the rear zone of a two zone system for the initial test. The problems started when I tried to fire up the front zone. I turned up the thermostat, the zone valve opened & the circulator engaged but the gas didn't fire up although the pilot was still lit. I then tried to repeat using the rear zone again but this time the gas didn't come on either. I tried each several times & no luck. I've got a Honeywell type L8148L aquastat relay, a Honeywell VS820C gas valve & two Taco 571-2 zone valves. It's a milivolt system. Maybe it's the gas valve? I don't know. Thanks DAS |