Maybe someone here with more hvac experience then me can chime in.
Had a contractor come replace my ancient boiler this summer with a new one. He wanted an additional $2k to install a zone control unit. I passed on it and was using the original control set up(t-stat directly wired to zone valves).
I ended up installing a Taco 4 zone valve control unit. Everything is wired correctly according to the instructions. Boiler turns on, water heats up. I have heat everywhere in the house. My issue now is if the thermostat is set above whatever the ambient air is, there is no call for heat. If the thermostat is turned lower than the ambient temp, it calls for heat.
It is going the opposite of what the thermostat tells it to do. These are older 2-wire thermostats that have a silver fluid(mercury?) in it. I have swapped the R and W wires and it made no difference. I am lost as to where to look next.
I added a ground wire to the box and now T-stats won’t call for heat at all.
Had a contractor come replace my ancient boiler this summer with a new one. He wanted an additional $2k to install a zone control unit. I passed on it and was using the original control set up(t-stat directly wired to zone valves).
I ended up installing a Taco 4 zone valve control unit. Everything is wired correctly according to the instructions. Boiler turns on, water heats up. I have heat everywhere in the house. My issue now is if the thermostat is set above whatever the ambient air is, there is no call for heat. If the thermostat is turned lower than the ambient temp, it calls for heat.
It is going the opposite of what the thermostat tells it to do. These are older 2-wire thermostats that have a silver fluid(mercury?) in it. I have swapped the R and W wires and it made no difference. I am lost as to where to look next.
I added a ground wire to the box and now T-stats won’t call for heat at all.
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