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Three Zone Oil Furnace Short Cycles On One Zone
I have a three zone forced water oil heating system. When the bedroom zone calls for heat, the furnace short cycles repeatedly. The other two zones work normally, independently and together. The issue is only when the bedroom calls for heat by itself or with one or both of the other zones. The Honeywell thermostat anticipators are set for longer cycling. I swapped thermostats and valve heads and the issue stays with the bedroom zone. I also swapped the valve heads and kept the wires in place so that the living room thermostat would control the bedroom zone and short cycling continued. When doing so, I verified the bedroom zone valve was the zone calling for heat by turning the other thermostats off, and I was able to pull the valve lever down on the affected zone. Hot water is flowing through the bedroom zone pipe but again it short cycles, so the bedroom doesn't get enough heat. Please advise. Thank you