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Hi, I recently bought a new Honeywell 4073 3 port valve and used the powerhead part to replace my existing one and it seemed to solve the problem I have been having with my system, but in doing so I noticed that the rotating shaft bit on the valve that the powerhead sits on is stiff to turn by...

Hi there, I have a Honeywell V4073 sundial Y plan 3 position diverter valve and I need to see if it is working correctly. To start with the hot water is scolding, so I replaced the tank stat but it made no difference and when I turn the CH off at the main control panel the radiators stay on. so...

I have a Potterton Netaheat Profile and a Honeywell thingamy whatsit that controls everything. It all appeared to work fine but the water got very hot, so I replaced the tank thermostat which was the obvious answer at the time but nothing changed. Could it be a second faulty stat or something...

I have a Potterton Netaheat Profile and a Honeywell thingamy whatsit that controls everything. It all appeared to work fine but the water got very hot, so I replaced the tank thermostat which was the obvious answer at the time but nothing changed. Could it be a second faulty stat or something...

I have a potterton netaheat Boiler with a Honeywell programmer. On Sunday the boiler decided to shut down and I noticed that the programmer screen was blank. I checked the 2a fuse inside the boiler and found that it had blown. I checked the electrics panel alongside the water tank...