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Fan not working when Fan Auto is set
Believe it or not; I still have 2 Glowcore FCU (Fan Coil Unit), I don't know what year is this thing, but didn't find any information about it ! I bought the house 3 years later and both worked well up to now.
My issue is this: The glowcore fan of the Attic does not start when FAN auto and heat mode is set in the thermostat. When FAN only is set, it works.
the boiler is in the basement, it is a separate unit from the FAN unit which is in Attic; the unit is essentially an air handler, with a fan motor and is compatible with source of hot water not exceeding 180F.
any idea what this can be? may be a relay issue? this is only thing I can think about.