I hope you can help. I have a boiler that isn't re-firing correctly.
I have a Baxi Solo 3 "PFL80" boiler, a Drayton Lifestyle LP722 controller and a Drayton room thermostat.
It's currently winter (obviously) so without the heating on, the room temp is much lower than that demanded by the thermostat.
When the controller time first turns everything on in the morning at 6:30, the room temp (14 degrees) is way below that demanded by the room thermostat (22 degrees), and the boiler starts and fires for about 20-30 mins. The boiler then goes off. The room temperature drops and drops but the boiler does not re-fire.
During this "dormant" state, on the boiler, the "boiler on" light is on. No ther lights are lit on the boiler apart from that. On the controller, both the heating and water lights are on. The room thermostat is "clicking" at approx the correct temperature according to my thermometer.
This morning, the heating came on and warmed up the house a bit. It then shut off after about 20-30 mins and room temp started to fall and was down to 14 degrees, and the boiler was still not firing. The "boiler on" light was showing on the boiler. The thermostat was sitting at 22 degrees and it was getting pretty chilly in the house.
Then, after some random time, about 45 mins this morning, the boiler eventually re-fired and the radiators warmed up again.
This problem is repeated in the evenings.
No amount of twiddling the thermostat, turning the water and heating buttons on & off at the controller, or turning the boiler dial off, on, up, and down, seems to have any effect whilst the boiler is in this "dormant" state. It then turns itself on without anyone doing anything.
I've had a plumber over to look at it. Needless to say when he comes over, the problem doesn't happen so diagnosis has been difficult. However it's safe to say that this has become less random and is now happening every morning and evening (plumber to return...).
The room thermostat has been replaced. The boiler PCB has been replaced.
What is the best way to diagnose what is causing this, and what pointers can I give ot our plumber when he calls again?
Thanks!
edit: I should add that when the boiler is firing, there are no unusual noises from it - all seems normal and the exhaust is blowing out through the vent/flue in the wall as normal.
I have a Baxi Solo 3 "PFL80" boiler, a Drayton Lifestyle LP722 controller and a Drayton room thermostat.
It's currently winter (obviously) so without the heating on, the room temp is much lower than that demanded by the thermostat.
When the controller time first turns everything on in the morning at 6:30, the room temp (14 degrees) is way below that demanded by the room thermostat (22 degrees), and the boiler starts and fires for about 20-30 mins. The boiler then goes off. The room temperature drops and drops but the boiler does not re-fire.
During this "dormant" state, on the boiler, the "boiler on" light is on. No ther lights are lit on the boiler apart from that. On the controller, both the heating and water lights are on. The room thermostat is "clicking" at approx the correct temperature according to my thermometer.
This morning, the heating came on and warmed up the house a bit. It then shut off after about 20-30 mins and room temp started to fall and was down to 14 degrees, and the boiler was still not firing. The "boiler on" light was showing on the boiler. The thermostat was sitting at 22 degrees and it was getting pretty chilly in the house.
Then, after some random time, about 45 mins this morning, the boiler eventually re-fired and the radiators warmed up again.
This problem is repeated in the evenings.
No amount of twiddling the thermostat, turning the water and heating buttons on & off at the controller, or turning the boiler dial off, on, up, and down, seems to have any effect whilst the boiler is in this "dormant" state. It then turns itself on without anyone doing anything.
I've had a plumber over to look at it. Needless to say when he comes over, the problem doesn't happen so diagnosis has been difficult. However it's safe to say that this has become less random and is now happening every morning and evening (plumber to return...).
The room thermostat has been replaced. The boiler PCB has been replaced.
What is the best way to diagnose what is causing this, and what pointers can I give ot our plumber when he calls again?
Thanks!
edit: I should add that when the boiler is firing, there are no unusual noises from it - all seems normal and the exhaust is blowing out through the vent/flue in the wall as normal.