i cannot get the central heating to work in auto mode on the valve. the hot water is ok but the only way to get the heating to work is to put the valve to manual position. i have changed the synchron motor twice but this has not helped. anyone got any ideas.
honeywell 4073 synchronous 3 port valve
- Thread starter eyeballroy
- Start date
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You need to prove the valve is moving beyond the mid position to the CH only position. If it does move as it should, you know it's not a wiring problem and you know it's not a stiff spindle.
That then leaves the other common problem , 'faulty micro switch'.
which prevents power leaving through the valves 'orange' wire to fire up the boiler. Changing the actuator head will then be the easy cure.
That then leaves the other common problem , 'faulty micro switch'.
which prevents power leaving through the valves 'orange' wire to fire up the boiler. Changing the actuator head will then be the easy cure.
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N
namsag
THere is a little board inside the valve head that burns out , if you have changed motor and still not working new head or complete valve req.
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