Hi,
I think we may have a problem with our motorised valve (Potterton MPE222) for the central heating. Could someone please confirm if I'm correct.
The symptoms are, that our CH comes on even when the timer is switched off, and when the CH is even set to the OFF position on the timer, it still comes on. Whether the thermostat (Honeywell) is turned all the way up, or all the way down, the CH still stays on. The only way to turn the CH off, is to turn the temperature setting down on the Vaillant Thermocompact System boiler.
All our rads have TRVs except the one in the hallway where the stat is located, this rad seems to be on most of the time.
I've removed the Potterton MPE222 from the plate and pipe in the airing cupboard (electrics still connected), and tested the stat in the hallway.
When the stat is turned up and clicks, the MPE 222 spindle turns very slowly for a about 10 seconds and then goes off, when I turn the stat all the way down the motorised valve spindle spins very fast for a few seconds then stops. Is this normal behaviour, or do I need a new Potterton MPE 222 (or equivalent)?
Even with the MPE 222 motorised valve device now detached from the pipe the problem still exists, the heat still comes on even when the timer is switched off, and stat is on 0 degrees. Is this conclusively due to the faulty motorised valve.
If I were to turn the valve on the CH pipe in the airing cupboard manually with pliers to the close position, would this be a temporary workaround?
I think we may have a problem with our motorised valve (Potterton MPE222) for the central heating. Could someone please confirm if I'm correct.
The symptoms are, that our CH comes on even when the timer is switched off, and when the CH is even set to the OFF position on the timer, it still comes on. Whether the thermostat (Honeywell) is turned all the way up, or all the way down, the CH still stays on. The only way to turn the CH off, is to turn the temperature setting down on the Vaillant Thermocompact System boiler.
All our rads have TRVs except the one in the hallway where the stat is located, this rad seems to be on most of the time.
I've removed the Potterton MPE222 from the plate and pipe in the airing cupboard (electrics still connected), and tested the stat in the hallway.
When the stat is turned up and clicks, the MPE 222 spindle turns very slowly for a about 10 seconds and then goes off, when I turn the stat all the way down the motorised valve spindle spins very fast for a few seconds then stops. Is this normal behaviour, or do I need a new Potterton MPE 222 (or equivalent)?
Even with the MPE 222 motorised valve device now detached from the pipe the problem still exists, the heat still comes on even when the timer is switched off, and stat is on 0 degrees. Is this conclusively due to the faulty motorised valve.
If I were to turn the valve on the CH pipe in the airing cupboard manually with pliers to the close position, would this be a temporary workaround?