Honeywell V4043H 1056 2 Port Zone Valve Normally Closed 22mm

Product Information

The electronics in Honeywell motorised valves tend to be quite stable and show relatively few faults but the motor may fail after years of operation.

Lever on a Honeywell 2 port valve | DIYnot Forums Lever on a Honeywell 2 port valve | DIYnot Forums

The auxiliary circuit (grey and orange wires) is commonly used to operate the boiler and/or the circulating pump. Old Satchwell Sunvic valve bodies used to turn through a full circle, as did Switchmaster Midi valve bodies.

These screws are diagonally opposite each other and pass through the steel base plate of the powerhead (actuator) into the brass flanged top of the valve body.

Honeywell Motorised Valve Faults - Free Heating Advice Honeywell Motorised Valve Faults - Free Heating Advice

As there is still a demand for Heating, the valve will motor to the Heating Only position (port A open; port B closed) and switch a 230V supply onto the orange wire, to power the boiler.

If, when the programmer is attempting to open the valve, the lever continues to feel stiff, then the valve is most likely to be faulty as it is not opening. I suppose my only question now is, after following your instructions how will I know if the valve is broken / needs replacing? A programmer and room thermostat (stat) are used to control heating times and room air temperatures. The valve won’t be driven open and the end switch will not be made (connected) so power will not be sent on to the boiler or pump. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development.