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Plumberpro
Plumberpro, Home Appliance Technician
Category: Appliance
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Experience:  Heating and hot water heating appliances experienced
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I have a Glow worm compact system boiler. it's a 2002 model

Resolved Question:

I have a Glow worm compact system boiler. it's a 2002 model , sometimes the pilot doesn't light and when it does light it only stay on for about 5 minutes.
Submitted: 1 year ago.
Category: Appliance
Expert:  Plumberpro replied 1 year ago.

Hi , is the pressure above 1.2 bar?

Does the boiler produce heat?

Customer: replied 1 year ago.

yes way above 2.6

Expert:  Plumberpro replied 1 year ago.
When it runs for those five mins , does it produce some heat , ie boiler lights and starts heating water?
Customer: replied 1 year ago.

yes

Expert:  Plumberpro replied 1 year ago.
OK , then most likely the boiler is overheating .
Causes are sludged ,dirty system
Failing pump
Or faulty boiler stat .
First I would try to bring the pressure down to around 1.2 by bleeding a radiator bleed valve( with rad bleed key) into a pot , release the water/ air till pressure drops .
Make sure radiators are all bled and any manual air bleed valves, especially near hot water cylinder as air can cause overheating as the water can't flow through the boiler at the right flow rate
Plumberpro and other Appliance Specialists are ready to help you
Customer: replied 1 year ago.

thank you

Expert:  Plumberpro replied 1 year ago.
Your welcome

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