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Well Nickso. Doesn't look like the OP has received any good reasons to join BG. I recently turned a BG job down for all the reasons that are being stated here. Mainly a company that will drop you in at the deep end and if you don't perform or meet the targets will spit you out again ...

Stay away!!! or be prepared to splash out more cash on childcare. You'll have to work as and when they say. Probably explains why they don't have that many female engineers. Stay with your dad, his company may be small but it seems to be more forward thinking :D I'd also be wary of...

turning the hot water tap on will make the boiler fire up and give you hot water.....

Left you a question in ur profile

My guess would be that it needs new thermisters. Probably the one on the primary flow. Maybe scaled up if the heating has not been on for a while. I'd replace both of them at the same time. You need a RGI as the combustion chamber needs opening up to get to the heating thermister.

Condensate pipe has been fitted incorrectly !! Also manufacturers usually state that max length of condensate pipe is 3m. By the way to me that 'overflow' looks like a solvent "t" to my eyes. A shame really as airing cupboards are usually near to bathrooms and with a little creative...

Maybe as you said your filling loop is 'letting by' Remove it and check. Maybe not the expansion vessel as you say the pressure rise happens when the boiler is at rest. Could also be a pinhole in the secondary plate heat exchanger allowing cold mains water to mix with the heating side.

Hi joe I'm not too familiar with these old boilers but have changed the diverter. It could be the syncron motor so i would swop this over first. You can test then with a meter or a flying lead but you need to know your way around electrics. Diverter is a pain to change and you need to...

4 WEEKS!! when i was an apprentice my gaffer wouldnt let me touch any gas appliance for 4 months

Seco services has given you the answer. :)

This is a simple pumped gravity system really. Needs upgrading at some point but i understand how money is tight at the moment. Boiler heats water (boiler thermostat controls the temp) and pumps it around the heating side through your rads until it "flows" into the room with your hot water...

typical halstead fault

venturi

A common problenm with Halstead combi's. If its not been used for a while the gas valve has a habit of sticking. Are you sure the venturi was properly cleaned out???

last one took me an hour with a brew after 30 mins :wink: I'd also recommend that the dhw thermistor is changed at the same time.

Did the power cut take out either the 3amp fuse for the boiler or the fuse on the pcb.

Anyone know of any installers who repair these makes of combi. Just recently taken a few calls from a few customers in my area who have these fitted. Seems to be the same problem - cant get central heating to work. I think on these that heating is wired up independently on the pcb board, but...

City & Guilds level 2 and they dont teach you the basics of bunging the system. Next youll be saying you dont know how to backfill a system to get rid of airlocks.

You say you changed the domestic hot water diaphram There are two diaphrams i think in this diverter valve assembly. One in the domestic hot water flow valve at the front and the other in the primary flow valve at the rear. the pushrods may also be sticking and need cleaning.

Looks as if it needs a new pressure release valve. However, also need to find out why its leaked in the first place. May be just grit/muck on the prv seal. When whoever changes the prv, get them to also check the expansion vessel.