Boiler leaking water when heating on

Question

I’ve noticed water dripping from my boiler when the heating starts. What is going on? No idea how long it has been happening

Utkarsh · Answer

this could be dripping from pump or valve. need to investigate to know where exactly its leaking from

Petros · Answer

There are a number of reasons why this could be happening. You need to get a gas safe engineer in to check the boiler over.

John · Answer

In order to give a full answer, I need to know what type of boiler & heating system you have. Could be a faulty safety valve or pipe blockage issue several other causes.!?

Paul · Answer

This could be multiple things, I've done work recently where leaks have developed from a thermistor and also one where a leak developed from the diverter valve cartridge, so leaks can develop from a multitude of places, only way to try and resolve this is have someone inspect, diagnose and repair the issue.

Dylan · Answer

This could be due to a faulty PRV pressure release valve or due to the expansion vessel required to be recharged or replaced.

Dan · Answer

This could be a number of issues normally it leaks from the condense pipework which is like an overflow pipe from the boiler. Well that could be a week coming from the P of a pressure relief valve which is a safety device connected to the expansion vessel.
Basically what this means is there an issue with the expansion vessel? So when the central heating is on the PRV starts to weep keep an eye on your pressure but call a gas safe engineer to rectify the issue.

Niaz · Answer

Sounds like your condensate pipe is leaking as this produces condensed as boiler runs

Russ · Answer

This will need a gas safe registared engineer to remove the front cover and take a look. As it only happens when heating comes on then its within the ch circuit, could be as simple as a loose connection

Kevin · Answer

It could be multiple different things, get a gas engineer to come and look at it.

Amin · Answer

Ideally you want someone qualified to pop round and have a look. There is multiple scenarios that can cause this issue.

Boiler leaking water when heating on

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