my warmflow oil fired boiler fires up and keeps going for about one and a half hours before it cuts out . It has recently been serviced and has had a new thermostat fitted. I dont think it should be going as long as this on its initial fire up. this is a warmfolw 50/70 boiler about 18 years old.

puzzled, October 2010

make sure baffle plates are not warped or broken causing heat to go straight up flue thus taking longer to heat actual boiler .

Bigroot, November 2010

When it was serviced was a smaller nozzle fitted?

www.elanar.co.uk, October 2010