Thermostat (seems) calling for heat, pilot light on, I hear water, it isn't boiling.. thoughts?

sky8899

I'm currently waiting on a plumber for the next week or so. It's the first time I've turned the system on this year. It's a Natural gas system, single zone with a mechanical thermostat.

- I have visually confirmed that the pilot is on.
- I changed the thermostat and cranked it up to 85 and I hear the click
- Boiler doesn't seem to be kicking on.
- Wiring seems to be okay


Anything I should check in the mean time while waiting on the plumber?

Jamie Hall

You have a nice simple system -- it appears that about all there is is a thermostat, a boiler, and a circulating pump. If that is so, it would be helpful to know if the thermostat controls the boiler directly, or if it turns on the circulating pump -- or both.

Do you hear a click at the thermostat, or down near the boiler when someone else turns up the thermostat?

Does anything happen at all near the boiler -- pump turns on, for instance -- when you turn up the thermostat?

JUGHNE

Need picture of other side of the boiler and one of front of boiler with door off.
Back up to show more.

EBEBRATT-Ed

There has to be a relay somewhere

sky8899

I haven’t checked if there is a click at the boiler end. I can check then. Here is a picture with the door off.

sky8899

sky8899

I don’t have a picture of the other side . I will take one later tonight.

JUGHNE

If you have only red and white at the tstat, jumper those together....only those two.
See what happens.

Show a picture of the old tstat, front with cover off and back.
Also the other side of the boiler.

sky8899

The old thermostat is exactly the same. I just changed the cover, I didn't bother taking off the wires to replace. Will try to get a picture of the other side of the boiler later.