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What I mean is remeber the reason we are on here. To help people. How’s it helping people by making them more paranoid. They don’t understand. It sounds like mumbo to them. To many what ifs when we all know most of it will never happen. Break it down make what you are saying more relatable to...

The only good reason a TRV should be on a towel rail is to stop a child getting burnt. That’s my guess why all towel rails fitted in new builds have them on. Like my house. The bypass was on the hallway rad. Coldest room in the house and where the roomstat is situated.

On the short time I’ve been on these forums I’ve noticed instead of helping out people it soon turns in to a ****ing contest. Gotta remember guys their general lack of understanding and having a simple query could make them more paranoid of things that could happen but rarely happen.

Hopefully your pump is wired directly to your boiler. This could possibly be the main cause of your problems if not. I’ve saw this before. Mainly on big system installs where hotwater is needed 24 hours a day.

If all rad TRVS were off and you used hotwater then your boiler will be fine. Ask yourself this If all the trvs are closed then why would the central heating be on? But no your boiler would go to lock out if you put the heating on and all rad valves were closed. Honestly if you are that worried...

I’m gonna get slated for this but if you don’t ever intend to turn off all your radiators at once then I wouldn’t worry to much about a bypass on a combi. Infact I’ve never come across a manual bypass/gatevalve on a combi installation. I would remove it. Don’t some combis have bypass valves...

What’s the pipe for? Central heating, hot or cold water?

Yes and maybe a non return/check valve on coldfill. But that can be disputed

Flow and return sensor problems maybe? Possibly, unsure? These types of situations I’d call up Baxi directly.

It’s actuslly a secondary draw off but people do use it for hotwwater circulation pumps too. It makes it easier but I’ve always felt Teeing in to the cold feed was the better option. It keeps a better circulation on the cylinder water.

Yeah that sounds like a great idea. Probably the best thing to do.

There is no way on earth my gaffer would ever give the go ahead to change a heat exchanger on a boiler that old. It would of been quote for another boiler.

Ok then flame sensor assembley and leads.

Pilot assembley is a lose term still used by some heating engineers to explain flame sensor spark ignition probe and leads.

That boilers gotta be at least 20 years old? I think you’ve had your money’s worth.

A quick visual inspection by a professional may determine the problem. Hopefully it’s just your flame sensor/ electrodes pilot assembley. Keep us informed.

Sounds like it could be your flame sensor. Hard to say without being there.

Do you have hotwater?

If your cylinder doesn’t have an extra connection the simply T into coldwater inlet of the cylinder and install non return valve before and after the pump got good practice.

Didn’t mean it like that. All I meant was as far as flow rate to taps goes that’s dictated by the circumference of the pipe work. The bigger the pipework the better flow rate you get. But, good flow rate is useless without a good incoming coldwater mains pressure. And that also goes for having...