Baxi solo wm/50/pf

[haventaclue]

Hi there any body any idea?
I have a Baxi solo wm/50/pf boiler
water in radiators and taps only get mildly warm, some times no heat.
Have put on new pump, drained and refilled system and cleaned motorized valve. Stuck for any more ideas, any ideas.
Thanks :

 

[gas4you]

Faulty cylinder stat?

Blockage in pipes, air lock?

Are rads getting hot properly?

 

[namsag]

Does it always fire up and when it fires up does it ever cut out on the boiler stat or does it just keep going.
Had a few of these recently where the main burner injector has crusted up and only letting about a quarter of the gas through that it should.
Also as the air pressure switch gets old it doesn`t always hold and causes the boiler to cycle on and off every few minutes

 

[haventaclue]

Thanks Dave
Have bled air throughout system so dont think there is air problem.
Did take off cylinder stat and no diff.
Radiators dont get hot
Any further ideas?
Thanks

 

[haventaclue]

Does it always fire up and when it fires up does it ever cut out on the boiler stat or does it just keep going.
Had a few of these recently where the main burner injector has crusted up and only letting about a quarter of the gas through that it should.
Also as the air pressure switch gets old it doesn`t always hold and causes the boiler to cycle on and off every few minutes

Hi namsag
Boiler runs for a short time say 30sec-2mins then cuts out and restarts about 2mins later, so as you said maybe i should check the air pressure switch?
Thanks

 

[namsag]

Tubes to APS have a habit of splitting so check these.. New switch is £30 plus vat.
If the pilot injector is partialy blocked it could also cause those symptons by being pulled away from probe as main gas comes on but that tends to happen quicker with boiler firing every few seconds