Low system pressure (light) on potterton puma boiler problem

abdul111 · 6 Sep 2008

i had a problem like allot of other people and i couldn't find what to do and after i found out that i had to clean the system pressure switch i didn't find the switch so i am uploading some pictures to help people like me.
please see the pictures in my album for instructions, my album is at:

//www.diynot.com/network/abdul111/albums/

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abdul111
6 Sep 2008
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abdul111
6 Sep 2008
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abdul111
6 Sep 2008
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mickyg · 6 Sep 2008

how have you ended up with an ideal pump in a potterton boiler?

gremlin16 · 6 Sep 2008

Well spoted

Agile · 6 Sep 2008

Does hitting a boiler with a hammer sound very technical or professional?

gremlin16 · 6 Sep 2008

Well it will for a non Rgi.

twgas · 6 Sep 2008

Agile said:
Does hitting a boiler with a hammer sound very technical or professional?

I always use a cordless hammer

robert19283 · 13 Feb 2019

Hi, I realise that this is an old thread but it has saved my life. I have a Potterton 80 still installed (really old house) and today the light was on and there was pressure.

I cleaned as instructed and the boiler kick started. I wanted to say thanks (assuming whoever posted this still reads) as the pictures and instructions literally saved us from the cold.

I hope it circulates the internet so that whoever has this model and the same fault can read it.

ianmcd · 13 Feb 2019

really surprised that your boiler is still running, I would be budgeting for a replacement if I was you, they were Shoite from the day and hour that they came out

Gasguru · 13 Feb 2019

What an idiot for uploading those images.
Do not hit it. Do not wash it out under a tap...you risk filling the switch with water on the contact side.
Clean the switch port gently with a 4mm screwdriver. Clean out the port in the diverter. Check the switch contacts are less than an ohm.

DP · 14 Feb 2019

Went to same model on Monday. No CH, now sorted. Clearly not a boiler to tackle if fitted in a cabinet with poor clearances

robert19283 · 29 Apr 2019

The boiler now has the same problem and the same solution was applied. I don't think the author is an idiot since he was able to isolate the problem. However, of course hitting a part isn't the best of technical solutions.

To answer: I did not replace this boiler because I am in a very particular situation regarding the house. I rent. But eventually it will need to be replaced I guess. With all the faults this boiler has, it has served us for little over 15 years. I feel I know its faults by heart now, and the PCB has been replaced also.

The easiest thing would be to replace the Water Pressure Switch, something I am thinking of doing.

I would hugely appreciate it if someone could provide some guidance regarding the replacement of this part, and if its a simple case of unscrewing with a wrench and screwing back on (with the boiler power being off).

Gasguru · 29 Apr 2019

Surely you're joking. You rent the property and have no right to touch the boiler. It is the landlord or managing agents responsibility to call in a registered installer to repair it.

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Low system pressure (light) on potterton puma boiler problem

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