Valiant boiler VCW-sine 18 T3 W

[headstartminibus]

Every time I use the shower, after five minutes the boiler switches off and then comes on again after twenty minutes. When I use the sink the water is extremely hot and after two minute the noise changes. The boiler is losing pressure and needs to be filled up to 1.5 bars every ten minutes.
Can anyone tell me what parts I need to change/order?

 

[mrgas]

Not without a lot more info.
It sounds like multiple problems.
You would be advised to get a boiler repair person in and check before you book them that thet are very familuar with your old boiler. They are good boilers but a tad unusual in their operation and not all boiler people will know how they work, especially the younger ones!

 

[Bunnyman]

Hi mate if you losing that much water pressure in 10 mins wheres it going? is it leaking out prv to outside or heating system there is nothing within the boiler other than the pressure relief valve that goes outside that can lose the pressure

Untitled

• Bunnyman
• 26 Mar 2010
• 499

 

[Agile]

It sounds to me as if the boiler may not be controling the temperature properly and overheating forcing water out of the PRV.

The temperature control thermistor may be failed/failing. can also be caused by gas related problems which we cannot advise about on a forum.

You fix boilers by diagnosing the problem first and then doing whats necessary, not just changing parts. Some problems are just because they are wrongly adjusted.

Tony