My baxi seems to be heating everything up ok. I still have heating and water but it seems to be firing up every 2 mins. It comes on for 2mins then off for two mins. It never used to do this. What could my problem be?
The boiler must be reaching the boiler thermostat's setting and turning off the gas valve.
If the radiators and hot water are hot enough it would indicate that the boiler stat is OK and set high enough. If the rads are not getting hot enough check the boiler stat is high enough (normally around 3 or 4 on this boiler) and if it is- it may be a faulty boiler stat, or the water flow rate through the boiler is to low (slow) and the boiler is making heat faster than the pump can remove it, so possibly a pump or system blockage fault.