Hello,
I am on the hunt for any advice on how to fix my slightly troubled potterton profile 50e CH system. I believe this is a gravity fed fully pumped system.
Recently we had no hot water or heating and I found the pump in the airing cupboard (a myson cp53) had seized, I was able to restart it but it died again a few mins later so I have replaced this pump with the cheap Wilo Smart pump from screwfix. All seems to be working ok now in terms of heating the water, but for some reason we now have the boiler firing and pump running continuously when the programmer (a potterton EP3200) controls (CH and HW) are both set to off!
The boiler also seems to be unresponsive to the timer. The programmer does still seem to switch the 3 port valve fine to CH on or off though and the room thermostat will also influence the 3 port valve position so I think that's working ok. All the lights and screen on the programmer all appear normal and i can hear the relays click when I mover the sliders to on.
I have believe I can rule out the microswitches in the Honeywell 3 port valve as its only a year old, and and I have also disconnected the grey and orange wires (which I beieve relate to the microswitches) from the terminal block in the valve wiring harness and the pump and boiler still run.
We have been living with this just by turning it off at the fused switch next to the programmer in the kitchen and the hot water heating and CH heating are fine. The only way to stop the boiler firing straight up from stone cold is either to remove the front plate off the programmer or turn the boiler stat down to 0. (the pump still runs thou).
I am thinking about asking one of my neighbours if I can try their programmer (housing estate all houses same boiler about 18 yrs old) but feel this is a bit imposing in case I bugger up their system somehow!
Is programmer fail likely? Or is there any possibility this could be frost stat or pump overrun stat fail? I presume as the boiler runs ok the PCB is ok?
Cheers for any advice on what to try next!
Dan
I am on the hunt for any advice on how to fix my slightly troubled potterton profile 50e CH system. I believe this is a gravity fed fully pumped system.
Recently we had no hot water or heating and I found the pump in the airing cupboard (a myson cp53) had seized, I was able to restart it but it died again a few mins later so I have replaced this pump with the cheap Wilo Smart pump from screwfix. All seems to be working ok now in terms of heating the water, but for some reason we now have the boiler firing and pump running continuously when the programmer (a potterton EP3200) controls (CH and HW) are both set to off!
The boiler also seems to be unresponsive to the timer. The programmer does still seem to switch the 3 port valve fine to CH on or off though and the room thermostat will also influence the 3 port valve position so I think that's working ok. All the lights and screen on the programmer all appear normal and i can hear the relays click when I mover the sliders to on.
I have believe I can rule out the microswitches in the Honeywell 3 port valve as its only a year old, and and I have also disconnected the grey and orange wires (which I beieve relate to the microswitches) from the terminal block in the valve wiring harness and the pump and boiler still run.
We have been living with this just by turning it off at the fused switch next to the programmer in the kitchen and the hot water heating and CH heating are fine. The only way to stop the boiler firing straight up from stone cold is either to remove the front plate off the programmer or turn the boiler stat down to 0. (the pump still runs thou).
I am thinking about asking one of my neighbours if I can try their programmer (housing estate all houses same boiler about 18 yrs old) but feel this is a bit imposing in case I bugger up their system somehow!
Is programmer fail likely? Or is there any possibility this could be frost stat or pump overrun stat fail? I presume as the boiler runs ok the PCB is ok?
Cheers for any advice on what to try next!
Dan