Hi.
I am having problems with my Main Combi 24HE boiler. DHW works fine (although pressure isn't great) but my CH keeps turning off. The boiler stays lit for approx 45 secs then turns off for 3 mins (This cycle just carries on).
I've read the boiler manual and it explains that the boiler will turn off for 3 mins if...
"3. When the flow temperature exceeds the setting
temperature, a 3 minute delay occurs before the burner
relights automatically (anti-cycling). The pump continues
to run during this period."
I think the heat exchanger may be blocked with limescale and other deposits.
I had carried out a DIY flush (prior to this problem) using mains pressure and sentinal 800 but I think this may have added to the problem. I think I may have moved alot of sludge and deposits from the rads into the boiler.
My question is...Which heat exchanger should I remove and clean? Primary or Secondary?
Any help/tips would be greatly appreciated.[/i]
I am having problems with my Main Combi 24HE boiler. DHW works fine (although pressure isn't great) but my CH keeps turning off. The boiler stays lit for approx 45 secs then turns off for 3 mins (This cycle just carries on).
I've read the boiler manual and it explains that the boiler will turn off for 3 mins if...
"3. When the flow temperature exceeds the setting
temperature, a 3 minute delay occurs before the burner
relights automatically (anti-cycling). The pump continues
to run during this period."
I think the heat exchanger may be blocked with limescale and other deposits.
I had carried out a DIY flush (prior to this problem) using mains pressure and sentinal 800 but I think this may have added to the problem. I think I may have moved alot of sludge and deposits from the rads into the boiler.
My question is...Which heat exchanger should I remove and clean? Primary or Secondary?
Any help/tips would be greatly appreciated.[/i]