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Will do. (y)

...repeating pump bleed when running, opened the centre slotted plug several times over the course of 10 mins - stacks of loud gurgling and rushing noises from the pump, and from the nearest rad. Anyway, repeated bleeding of the pump seems to have done the trick, as boiler has been firing for 10...

...ok, with system at rest, completely removed the chrome slotted plug from the pump and neither water or air expelled! (for what it's worth, the system has not been drained down and refilled, these airlocks only became obvious after replacing the actuator head of one of the 2 port valves).

No. Should I do that with the system at rest or when pump running?

Grundfoss ups2 15-50/60

The CH pipework is under the ground floor floorboards. However, I did find an AAV in the loft this afternoon, fitted to a 22mm pipe which looks to be the flow pipe to the bathroom towel rad. So to heat towel rad, pipe goes up from airing cupboard, across loft floor, runs down vertically inside a...

Simply that CH and heating of water worked as expected for a few hours, post replacement of actuator!

It's definitely on the flow side. There is an air separator piped in. Goes Boiler-vent-feed--pump.

Tried this, nothing to indicate metal sludge where feed pipe tees into the flow pipe. Should I be using a special 'heating engineers magnet'?

Replaced the actuator/head on the 2 port valve that feeds the hot water cylinder coil two days ago. Tested HW and CH independently then tested with both HW and CH called for simultaneously - all seemed good, apart from a towel rad in the bathroom was hot only at the bottom half, cold top half...

Follow up to confirm replacing the valve with a new one has resolved the problem. (y)

This annoying noise presented itself following a water meter install a few weeks back, which may or may not be a coincidence. I've tested every hot and cold outlet in the property and can confirm the noise is triggered by use of cold taps and the washing machine. The noise does not occur while...

Cleaned the area thoroughly with electrical contact cleaner spray, sadly didn't make any difference. Frustrating that I can't locate the root cause of the fault, no doubt something simple. Don't want to keep throwing new parts at it in desperation, when a replacement is relatively low cost...

Replacement brushes arrived yesterday. Removed both existing brushes, one had worn down to approx 4mm, while the other brush still had more than 20mm remaining. Installed new brushes, buttoned up the machine (such was my confidence in getting a result), loaded with clothes and detergent...

Quick update... Replacement pressure sensor received and installed. Made no difference, original symptoms remain. The model is indeed IWC 71252. Removed one of the brushes for inspection and there was plenty of meat on it - and it is two 5.5mm hex head screws as mentioned! Run out of...

Those video's are fantastic, thanks. Washer looks identical to mine - unfortunately I simply can't get the machine to enter service mode! Tried umpteen times, same result occurs regardless, a click is heard, the door locked indicator is illuminated red, nothing happens. The model in the title...

Persevered with continuity testing, nothing from centre contact to left contact, or centre contact to right hand contact. Expected one of them to have continuity without pressure applied. This is the sensor: On testing, the internal mechanism is defaulting to the 'up' position. Only when...

The terminals inside the switch are ridiculously difficult for making good probe contact, they're like barely accessible, thin painted on strips of copper, as such I'm not confident in the accuracy of my testing. No continuity sound audible from the meter after several test attempts. Retested...

Multimeter on 200k setting the reading is 4.32 across terminals of both solenoids. Bought some pipe to attach on the pressure switch - on testing no click heard.

After much head scratching, opened up the multimeter to examine the battery, noticed the internal fuse was blown. Strange as the continuity test feature still worked ok. Took a drive to a local electrical supplier for the unusual spec fuse. Will get on to this again tomorrow. Pipe clear when...