potterton profile 60e LPG

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rita jenkins

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• 18 Dec 2006

• #1

My boiler fires up and runs fine for 3mins then main burner keeps tripping off and on fairly rapidly but pilot stays on. This has been going on for some time but this morning it just got so bad it isn't heating up the rads or water.
Could this be a blocked heat exchanger?!
Should I get shot.
Any ideas would be greatly appreciated.

 

ChrisR

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• 18 Dec 2006

• #2

Could be a cheap thermostat. I know plumbers are hard to get, but shooting yourself seems a little drastic.

 

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baxpoti

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• 18 Dec 2006

• #3

Does the fan keep running?

and avoid getting shot, wear a bullet proof vest just in case!

 

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rita jenkins

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• 18 Dec 2006

• #4

I've already changed the stat so I'm sure it's not that.
I had a heavy duty fernox cleanser in it for 5 days then flushed it really well. Could this have somehow blocked the heat exchanger up?
Have I shot myself in the foot!

 

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rita jenkins

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• 18 Dec 2006

• #5

yes the fans running ok

 

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baxpoti

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• 18 Dec 2006

• #6

Is it fully pumped or Gravity hot water

 

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rita jenkins

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• 18 Dec 2006

• #7

fully pumped

 

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rita jenkins

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• 18 Dec 2006

• #8

I had an engineer around who fitted a new air pressure switch and PCB cost a fortune! didn't fix this problem and then told me I needed a new boiler the next day on the phone.

 

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baxpoti

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• 18 Dec 2006

• #9

Is the pump running freely and is it wired directly back to the boiler

 

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rita jenkins

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• 18 Dec 2006

• #10

yes pump is running freely and it is wired directly back to the boiler.
But it shouldn't be, should it?

 

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rita jenkins

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• 18 Dec 2006

• #11

wired directly back to the boiler I mean!

 

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rita jenkins

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• 18 Dec 2006

• #12

wired directly back to the boiler I mean!

 

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baxpoti

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• 18 Dec 2006

• #13

With info given
it's back to the thermostat part number 404504
or you 've got a restriction in your system
Does the flow pipe get hot? if so how far along? does it reach the pump, motorised valves, radiators, hot tank?

 

Agile

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• 18 Dec 2006

• #14

It sounds like a fan/aps problem but before coming to that conclusion I would have measured the flow and return temperatures when it starts turning on/off.

This would confirm the system flow is adequate.

Tony

 

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rita jenkins

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• 18 Dec 2006

• #15

It's been reaching everywhere until this morning when everything was luke warm . The intermitent off/on of the main burner has increased suddenly so this is the reason it wasn't heating up this morning.