Potterton Kingfisher RSL100 Lockouts

Low system pressure? (apologies if this has already been mentioned)

Paul.
 
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I did use thermal transfer paste and the pump is set to 2. The system runs using pumps rather than motor valves and at time of overheat, both the flow and return pipes are redhot.

the presure gage on the pressure vessel is set to 1 1/2 which I was told was about right?

thanks.
 
Right then its a problem with the boiler.

Unfortunately, it could be the PCB although in my experience thats less likley for this type of problem.

It could also be a gas valve problem, settings or faulty.

Since the PCB is quite expensive I would always eliminate all the other possibilities.

A simple one is to test the potentiometer but that does have to be done properly!

You may need to call out a registered engineer but with this kind of more difficult fault it will have to be a good one! Make sure its on a no fix-no fee basis!

Tony
 
thank you Tony. One thing I have noticed is that the system does have air in it.

I have tried to flush this into the rads to bleed it but should I be doing this with an open tap to feed the expansions tank?

Could my problem be an overheat when a large air bubble goes through the system?
 
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How do you know there is air in the system?

What difference does it make when the pump is on "3" ?

You did not comment, or presumably do, the test on the potentiometer!

That needs to be eliminated from the list of possible problems.

Tony
 
If the flow and return get that hot then that would suggest poor circulation in system.
 

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