What happens is this: the thermostat reaches the minimum temp, sends a signal to the zone valve that turns and send signal to Argo Control, which than starts the circulators and also send the signal to the Aquastat relay, if temp is less than 180F, the Aquastat sends signal to the gas valve for the boiler to starts. the signal is lost somewhere ...

Honeywell Aquastat L8148E1257. Honeywell Aquastat L8148E1265. $200 price difference cause the first one has a vent damper damper connection but don’t see any noticeable difference between on the internal parts besides the white flap and the number on the transformer

Oct 1, 2022 · L1 and L2 should be 120 VAC power. It's unlikely that either one is a common for the transformer output. It is remotely possible that one of the two terminals on the aquastat dial is common -- that is, directly connected to one side of the transformer output -- but to verify that you need a multimeter.

We have a Honeywell L8148 that has started to act up and in<br /> lieu of spending $450 to have a technician replace it, I’m interested in<br /> swapping it out myself.<br /> This will be the third time within 6 years of ownership that<br /> the aquastat will have to be replaced.<br /> To give some background of the problem, the burner will<br /> sometimes fail to ignite.

Hello, I have a boiler with 3 zones and a Honeywell L8148E 1216 aquastat. I've recently started having a problem with my heat, and I think I've traved the problem to this aquastat. The system works fine most of the time. Thermostat calls for heat, aquastat gets 24V between B1 and B2, damper opens, and the burner fires up.

Honeywell Aquastat L8148E1166. ... L8148E 1265 is the replacement control. the 1166 just means that is was ...

Any and all help/ advice is greatly appreciated! I have an EnerJet Natural Gas Water Boiler (1) Taco circulator pump (pulling) (3) Thermostats (3) Honeywell V8043E1012 zone valves (1) Honeywell L8148E Aquastat Relay (1) Automatic Gas Vent Damper (1) High Temperature Limit Switch (I'm guessing), in the exhaust hood (1) Honeywell VR8300C4506 Step Opening Dual …

Jan 16, 2024 · We have a Burnham Revolution RV5 boiler, baseboard + radiant floor heating system which has a Honeywell L8148e aquastat. Our house has a 20kw Generac standby generator and automatic transfer switch. We recently had a power outage for about 2hrs during single-digit weather. When the power went out, the boiler shut down.

Old aquastat L8148E thermostat failed and would heat to max temp only 240 degrees. Swapped in new aquastat L8148E and burner will not fire. Power comes in but no 24V out of the transformer. Tried another brand new aquastat. Same problem.

I would like to use 2 NEST thermostats on my boiler. I have a Honeywell Aquastat L8148E. I also have 3 Zones (valves are Honeywell V8043E1012) and will be using a NEST on only two of the Zones I have currently 2 wires connected to the thermostats, both …