Hi all,
I have a 20 year old gravity fed system in a house I moved into last year and the other day my honeywell V4073A 3 port valve got stuck with its lever all the way to the left and no central heating. I moved it all the way to the right "manual open" without latching it and after the house warmed up it was able to move its lever left again towards the middle. I checked all the wiring is correct and by fiddling with the cylinder thermostat and poking the microswitches in the valve actuator head I can get it to move by itself in both directions although it seems to struggle moving to the right. Yesterday the house wouldn't get as hot as the room thermostat was telling it to and now I've latched it to the manual open and the house is warmer.
I'm looking at replacing the actuator head. It says on it to replace with Honeywell 4000-3916-002 but that doesn't seem to be widely available. I have found 2 online shops selling the -002 model but I don't know if that's old stock or whether it's been superseded by 4000-3916-003 or what.
Should I get the £30 compatible replacement on ebay (?Banico branded) that claims to be 40003916003 compatible or get the genuine Honeywell part. BHL.co.uk sells the genuine -002 for £57 and -003 for £65.
Cheers,
Matthew
I have a 20 year old gravity fed system in a house I moved into last year and the other day my honeywell V4073A 3 port valve got stuck with its lever all the way to the left and no central heating. I moved it all the way to the right "manual open" without latching it and after the house warmed up it was able to move its lever left again towards the middle. I checked all the wiring is correct and by fiddling with the cylinder thermostat and poking the microswitches in the valve actuator head I can get it to move by itself in both directions although it seems to struggle moving to the right. Yesterday the house wouldn't get as hot as the room thermostat was telling it to and now I've latched it to the manual open and the house is warmer.
I'm looking at replacing the actuator head. It says on it to replace with Honeywell 4000-3916-002 but that doesn't seem to be widely available. I have found 2 online shops selling the -002 model but I don't know if that's old stock or whether it's been superseded by 4000-3916-003 or what.
Should I get the £30 compatible replacement on ebay (?Banico branded) that claims to be 40003916003 compatible or get the genuine Honeywell part. BHL.co.uk sells the genuine -002 for £57 and -003 for £65.
Cheers,
Matthew
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