Honeywell aquastat trouble (outdoor wood stove)

[jtisdale]

Anyone have any knowledge of aquastats sticking and not opening the circuit when the high (or low) set point is reached? Here's the deal... I finally got my outdoor wood stove all hooked up and fired. I set the aquastat to run the blower at 150F and shut off at 160F. All was great for almost two weeks and then on the Friday after Thanksgiving, a buddy stopped in the morning to drop off some parts, and he says the stove was boiling over. I ran out to investigate and the temp gauge read 210F and the blower fan was still running! I flipped the breaker off and started checking things over. The only thing I can figure is the auqastat "stuck". I checked a few connections and the 190F snap limit switch (that is wired in series between the aquastat and the blower fan) but I couldnt find anything wrong. I let it cool down, topped it off with water, cautiously fired it back up and it has been fine since.



Any ideas???

I really dont want to buy a new aquastat if I dont need to, but I dont know if I can trust this one either.

Thanks, Jim

 

[daytripper63]

Anyone have any knowledge of aquastats sticking and not opening the circuit when the high (or low) set point is reached? Here's the deal... I finally got my outdoor wood stove all hooked up and fired. I set the aquastat to run the blower at 150F and shut off at 160F. All was great for almost two weeks and then on the Friday after Thanksgiving, a buddy stopped in the morning to drop off some parts, and he says the stove was boiling over. I ran out to investigate and the temp gauge read 210F and the blower fan was still running! I flipped the breaker off and started checking things over. The only thing I can figure is the auqastat "stuck". I checked a few connections and the 190F snap limit switch (that is wired in series between the aquastat and the blower fan) but I couldnt find anything wrong. I let it cool down, topped it off with water, cautiously fired it back up and it has been fine since.



Any ideas???

I really dont want to buy a new aquastat if I dont need to, but I dont know if I can trust this one either.

Thanks, Jim

Aqaustats are designed to switch "control voltage" not the load amperage of a motor what you nee to do is install an enclosed relay and have the aquastat operate the relay and let the relay energize the motor since the relay is designed to switch a load

P. S. If you need another aquastat or an enclosed relay send me a P. M. with the part # off the old stat and I can let you know how much I can get them for