temp and pressure guage |
problem valve is on the left with cover off |
zone valve wiring |
The zone valve is a Honeywell F4 9819, and I have a Honeywell 2 wire heat only mercury thermostat. The problem zone valve is on the left. I have the end switch on manual so the problem zone heats up every time the other zone heat comes on, and I can now say that left to it's own devices it does keep the problem zone sufficiently heated. After leaving it on for a sufficient amount of time I found that the only reason it wasn't fully heating was that I had the other zone set very low because I kept electric heaters on, so the furnace was rarely turning on in the non problem zone so the problem zone was rarely receiving hot water. Of course it still won't follow what I set on the thermostat. Are we still looking at a bad zone valve?
Did I make any sense?