Question about Heating & Cooling
I have a honywell Honeywell V4073A-3way valve. The central heating side works fine butwhen I select HW the the pump runs and the boiler fires up but the water does not appear to be flowing to the tank coil. Does this sugest that the valve is faulty. the valve motor runs when there is a change form ch to hw or vici versaJohn S
If the valve runs at other times, the valve is OK. you have a relay somewhere that is not sending signal to the valve when in that mode.
Trace down all the relays for that cycle and check voltage going int, coming out, and to see if the coil is enrgised.
Posted on Jan 01, 2009
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Posted on Jan 02, 2017
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