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Sounds to me as if the expansion vessel has burst or needs re-pressurised. The Expansion Vessel in the boiler takes up the extra pressure in the system created by the expansion of water as it heats. The expansion vessel has a diaphragm which seperates compressed air on one side and the...

I have an installation in a first floor flat with one baxi combi 80e and one gas cooker (lyric 50 i think). Tenant has complained of smell of gas for month or two now. Every time I send out contractors to check they get 0mBAR drop on system with/without appliances. Tenant keeps calling out...

Your boiler's fine, the pilot light will quite happily stay lit while the power's off. What we need to know is how long is the boiler staying lit for and are the radiators getting up to temperature before the boiler cuts off?

I know it's a lot of work but if you're using microbore (8mm or 10mm), the best way is to channel out the wall for plastic wire trunking (the white plastic stuff used to hide electrical cables) and run the pipes in that. It protects the copper pipes from corrosive elements in the plaster and...

This is a post that could have literally hundreds of answers because everyone will have their own views. For what it's worth heres mine. Renew your whole system with a reliable condensing system boiler and a high recovery hot water cylinder. This will ensure that you still have that...

good luck to you, let us know how you get on.

Sounds to me like the air-pressure switch is at fault or even worse, the fan has ceased, either way you need to get a professional to look at it.

not half as bad as catching your b...

If the pressure is lower than 1 then you can adjust it. You need to locate the filling loop. The filling loop is usually a silver braided pipe underneath the boiler (If the boiler is in the kitchen it'll usually be somewhere under the worktop just out of reach of any normal person!!) The...

Have you checked the system pressure guage which is situated on the bottom of the boiler on the left hand side (if memory serves), it should read 1 - 1.5 when the boiler is switched off?

I would suspect the pump first and foremost, even if there is noise/vibration from the pump, there is no guarantee that it is displacing water. If it is not on max already turn up the pump speed (black or white control knob, dependant on pump manufacturer) and try again.

The boiler would fail to operate so this would give a false diagnosis as it may be due to a faulty component which would only trip the fuse when power is applied to it (ie fan and gas valve)

sorry to state the obvious but he has opened the iso valves on the flow and return?

oh too oh ate sax sax fhiv sax oh oh sax if you want,(one of the ones I use)

I really would leave this in the hands of a competent engineer, sounds like the companies you are calling are only interested in selling you a new boiler. You may want to consider the option of getting a certain well known national company in, they are quite expensive and more than likely will...

I may be on the wrong track here (I'm sure someone will tell me) but your problem sounds like one of the thermostatic valves on the radiators is "chattering" This causes the valve inside the TRV to vibrate and the noise will transfer through the pipe work to a suitable amplifier (ie. radiators...

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