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I am G3 certified pete. There is no other tapping available, I was suprised that the flow to the bathroom shower stopped completely when the shower in the coach house was running although the two bathrooms in the house are upstairs but the coach house is on the ground floor which is the same...

I have just looked at a unvented cylinder with pressure problems. The customer called me in asking me to fit a pump on the mains but the mains pressure is 2.5bar and flow rate over 22l/min which should be fine for an unvented cylinder. The problem is that when the two showers in the house are...

Quick addendum: I did turn all rads off bar the cold one and that just shut the burner off quicker before anyone mentions it....blockage it is then..hopefully! :twisted: :D :twisted: :D

Cheers nikso, think thats it. Went back today for a quick visit and managed to get one of the cold rads hot when I stuck the boiler on full whack with the commissioning function. The last rad seems to have a blockage as the flow warms up but heat stops at the valve. I popped a new trv on with...

I had kind of ruled out diverter as I only put a new one in recently but I guess that doesnt mean its not faulty. Seeing as 7 out of 9 rads heat up my circulation theory is probably c**p as that should provide enough circulation for the boiler not to reach temp. Is there a way to make the...

Just in case this is of use to anyone in the future, I removed the DHX and pump to check for blockages and found they were a bit mucky. The main problem seem to be that the flexi pipe that connects the expansion vessel to the system was almost completely blocked with sludge. Strangely this didnt...

I've a problem with a 28cdi not firing for more than a minute or two on heating. Ive ruled out scaled/sludged HE as it fires continuously on hot water. It has a new flow thermistor and a 2 month old diverter so they should be fine. Filling and bleeding the system is a long old process, but...

Main HX should be fine boilers not that old.system is clean and protected. You may have something with the concrete theory though.... :lol:

hi, have just changed diverter on Ideal Isar HE 30 thinking i would resolve intermittent hot water issue but no joy. The boiler has had this prob for over a year and im the 3rd engineer to have some fun with it. Firstly, the DHW heat exchanger was replaced and a scale reducer installed a...