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Hi My radiators are noticeably not as hot as they were. I observed the boiler for about 5 or 10 minutes whilst holding the flow and return pipes. The burner fires up and the flow pipe would get hot as expected and then the burner would cut out completely after maybe a minute or 2...(not...

//www.diynot.com/forums/viewtopic.php?t=217549&start=75 as per the link above i just got in an engineer and he reckons its the primary heat exchanger? is this a plausible cause? he says its kettling. I started this thread because i believe i must have left a long pause between posts...

I'm thinking of changing my Vaillant VCW GB 242 EH Boiler. Its over 25yrs old. I'll be sad to see it go cos it's been a cracker of a boiler! I've got to know this boiler very well. I was looking around on this forum and various other places and much is said about the Remeha. It sounds like a...

Hi all, this post has been copied from another one of my posts. I was concerned that that thread was over 4 years old and might not get picked up My friend asked me to have a look at her boiler. Long story short: All functions seem to be working except the crucial bit.... actually...

Just replaced DHW heat exchanger thinking my old problem is back! The hot water basicly was getting cooler and cooler. Usually in the past this meant DHW heat ex. was getting debris in it. So instead of cleaning the old one my thinking was to buy a second one and keep a clean one on stand-by...