Confused about Main 15 HE boiler

[pdel]

Hi. We moved into a new flat in the summer and are only just beginning to get used to the central heating. We have a Main 15 HE boiler which has 3 led display lights. The main light is always green indicating that the boiler is on and working, the one next to the main is the boiler light which flashes when the heating is turned on. What's odd is that when we turn the heating on, the boiler light stays green for a bit, which is when the flame is turned on and lit, then after 5 minutes, the flame goes out and the boiler light starts flashing green, and then after 5 minutes again, the flame is lit up and the boiler light stays constant for that duration and then flame goes out and it starts flashing. Is that normal? It hasn't affected the hot water at all, but I have noticed that the house takes longer to heat up (but then again, it could just be the cold weather outside) I am confused as part of me thinks that maybe, it's just how it operates, but then shouldn't the flame be on all the while that your boiler is on? The 3rd light is off and it should stay that way, indicating that the boiler is fine, but it's the flashing green boiler light and the flame going on and off that I don't understand. Anyone have a Main 15 HE boiler? I that how it operates?

 

[petertheplumber12]

I have looked at the boiler manual, faults etc. when the middle boiler light flashes it can be 1 of several things. for example burner is at a false flame, water circulation prob,flow thermistor fault,casting thermistor fault. these can all be checked with a multi meter and a competent engineer. so get someone you know or is recommended or from gas safe reg web site. they should be able to fix it without it costing an arm and leg. ask them if there is a call out charge first, not all of us charge call out fee.

 

[Agile]

I dont charge a call out fee but I do charge a fixed price diagnostic fee.

Some charge by the hour so you pay more if they are slow ( or doing a more beneficial go slow! ).