On page 4 of this PDF www.pexuniverse.com/docs/pdf/Honeywell-Aquastat-Relays-L8148.pdf , figure 3 looks simular to what I have except my Switching Relay is turned 90 degrees so that the word Honeywell is horizonal. The same little piece of metal with with Honeywell on it is the piece I lift to make it work. It seem to work correctly when I have something stuck underneath the metal piece.
As far as putting a jumper wire across the T-T terminal, can you tell me which are the T-T terminal according to the figure 3. I see something labled TV and another labled T.
I did go around and check my thermostats and found one of them looks like someone bumped it. I could not turn the dial, it was kind of pushed in. I took off the ring straightened it out and it looks like it works normal.
Are they difficult to change out? Do I just take it off the wall and put a new one there? Do I have to turn off electricity before doing it.
I changed the thermostat, but still doesn't work. I talked to the Honeywell tech on the phone and he had me take the thermostat off, test the voltage in the wires (24v), and twist the wires together. He told me to turn on the furnace and see if it works. It didn't. he said that it is not the thermostat then.
It did make me think, even if one of the thermostats wasn't working, shouldn't the furnace run if one the the other 3 thermotats were calling for heat? Where do I go from here?
Yes, the boiler starts right up if I jump T to TV. I have 4 termostats. Each one has 24 to 26.9 volts. Since there is power, wouldn't that mean they are all connected? I traced the read wire from the Aquastat Relay through all of the zone valves (4 of them) until it disappears up through the floor. I assume that it is going up to the thermostats. I can't follow it.