Potterton Profile 60e trips

[paulw317]

Hi,
I have a potterton Profile 60e boiler that is about 18 years old. Last year when we had it on just for the hot water it started to trip out about every 5 minutes.
We had it powerflushed and it was then ok for about 2 weeks but then started to trip out occasionally until it was every 5 minutes again.
When we turned the heating side of it on (for winter) the problem stopped and has been ok since.
Now it is getting warmer I have been turning the heating off occasionally, and guess what, it is tripping out again every 5 minutes.
The boiler is quite noisy (kettling) when it is warming up and the overheat thermostat has been changed.
Any ideas before the weather gets too warm??

 

[seco services]

whats the boiler stat set to (number) ?

 

[jackecole]

what difference would the boiler stat setting make?

Could be a sludged up heat ex or a failing pump.

 

[paulw317]

Boiler stat setting set to mid way between 3 and 4, it does click and switches the boiler On & Off when turned so I think that is ok.

Pump is a Grundfos Selectric (that what is says on the pump!!) with a setting of 1-3, 3 is the fastest pump speed which is what it is set on.

Would the powerflush have removed all the sludge out of the system, including the boiler, or does it not flush out the heat ex?

Cheers

 

[seco services]

whats the boiler stat set to (number) ?

er cause profile trip when they are set to max.