Hi, I wonder if someone can help me please?
I have a Potterton Performa 24 which is no longer igniting.
I changed the diverter diaphragm yesterday, and after correcting the pressure (1.2Bar), everything worked fine.
However this morning it refused to fire, so I checked the pressure & found it to be almost at minimum. I corrected it again, this time to 1.5Bar, and it worked again.
Now several hours later it is refusing to fire again.
When I open a tap or operate CH, the diverter operates the switch as normal (phew!), which starts the pump, then within the control box a relay can be heard operating.
And that's it. Normally the burner ignites immediately after that relay operates.
I've tried pushing the pressure up to 2Bar, still nothing.
A little more info:
Found the engineers reset switch, tried that a few times, boiler eventually worked.
Long enough for one shower followed by about 20mins of CH. Then the boiler started to cut out/switch on/cut out.
Turned the heating off.
Pressure now down to 1Bar, topped it up.
DHW now no longer works.
CH produces the same intermittent on/off malarkey.
During all of this the pressure gauge is up & down like a bride's nightie.
Jumps to 2Bar (from say 1.4) when hot tap is turned on.
Drops by approx 0.2Bar when heating is activated, climbs when switched off.
Ultimately it loses pressure with each attempt.
Any clues?
And I've now noticed that the pump housing is very hot. Guessing it shouldn't be.
This problem appears (at this point) to be on the heating side: When the pump is cool & all is reset, pressure ok etc, the hot water seems to work ok. it seems the heating is what causes the pump to get hot, and I'm guessing this is tripping the safety thermostat.
When changing the DHW diaphragm I obv switched off the cold water inlet and ran a tap to dry, then used the filling loop when finished. Am I likely to have introduced air into the system this way? Am gonna bleed the rads (which I can get to) but what else is likely to have caused this? Blocked plate hex?
Somebody help me, please?
I have a Potterton Performa 24 which is no longer igniting.
I changed the diverter diaphragm yesterday, and after correcting the pressure (1.2Bar), everything worked fine.
However this morning it refused to fire, so I checked the pressure & found it to be almost at minimum. I corrected it again, this time to 1.5Bar, and it worked again.
Now several hours later it is refusing to fire again.
When I open a tap or operate CH, the diverter operates the switch as normal (phew!), which starts the pump, then within the control box a relay can be heard operating.
And that's it. Normally the burner ignites immediately after that relay operates.
I've tried pushing the pressure up to 2Bar, still nothing.
A little more info:
Found the engineers reset switch, tried that a few times, boiler eventually worked.
Long enough for one shower followed by about 20mins of CH. Then the boiler started to cut out/switch on/cut out.
Turned the heating off.
Pressure now down to 1Bar, topped it up.
DHW now no longer works.
CH produces the same intermittent on/off malarkey.
During all of this the pressure gauge is up & down like a bride's nightie.
Jumps to 2Bar (from say 1.4) when hot tap is turned on.
Drops by approx 0.2Bar when heating is activated, climbs when switched off.
Ultimately it loses pressure with each attempt.
Any clues?
And I've now noticed that the pump housing is very hot. Guessing it shouldn't be.
This problem appears (at this point) to be on the heating side: When the pump is cool & all is reset, pressure ok etc, the hot water seems to work ok. it seems the heating is what causes the pump to get hot, and I'm guessing this is tripping the safety thermostat.
When changing the DHW diaphragm I obv switched off the cold water inlet and ran a tap to dry, then used the filling loop when finished. Am I likely to have introduced air into the system this way? Am gonna bleed the rads (which I can get to) but what else is likely to have caused this? Blocked plate hex?
Somebody help me, please?
