Honeywell 4043

Oct 01, 2010 5 Replies

Should opening it manually operate the microswitch ?



I've always assumed it did, but have just bought a replacement head and with the lever fully over, the operating plate is about 2mm shy of the switch, let alone when dropped back into the catch.



So is it just supposed to open the valve?



Andy Cap


I'm pretty sure they only open the valve. I had one with a dead motor and using the manual opening lever did not trip the microswitch.

Don't think so, the manual opening is just that to facilitate filling/draining/bleeding without having to have power. You wouldn't want say a pump and/or boiler to come on without the system fully primed...

Thanks both. No, that makes sense. ;-)

Andy C

Defo confirmation, the microswitch is only operated when the motor operates the mechanism, not on manual.

That's my vague reollection too.

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