baxi solo 3 gets hot then turns off[as normal] but is not coming back on for about5 min .why. i just cleaned out the pump which was full of thick sludge.

stevie, October 2013

If the flow and return boiler pipes become hot quickly with cold rads then it isn't circulating around the system correcly

A1, October 2013

boiler shouldn't switch off until rads are red hot and room is up to thermostat temp.If it isn't doing this then you have a blockage or airlock or something which is making the boiler get over hot and cutting out for safety.pump will still run but burner will be off,then it retries.thick sludge in pump means its in the whole system.might need a power flush

A1, October 2013

pump is running & radiators where getting hot. just boiler time to reignight too long.

stevie, October 2013

can you confirm pump is running?
you say it gets hot then goes off and doesn't come back on for 5 mins.Do the rads get hot or just local boiler pipework.kind of confussed!!

A1, October 2013