Am i hooked up right?

nuttybolts

Im not getting enough heat. I have a gas water boiler slant fin radiant heat system with 2 zone valve. Please tell me if i have thermostat hooked up correctly? There are only 3 wires comming to it

Ironman

Probably not. The third wire should probably be on the “C” terminal, but we need to see how it’s connected on the other end.

nuttybolts

Thanks Bob what do i need to check Zone valve wiring?

nuttybolts

Another pic of wiring in boiler

nuttybolts

Which wire should i take off and put on C

unclejohn

Big difference between no heat and not enough. First did you change any of the wires at the tsat or valve or boiler?