Recent content by beng77

Just to close this thread off, in the end I went out and bought a 172490 PCB set the jumpers to match my existing one and installed it last weekend. Been switched on and working perfectly ever since. Ben.

Hi Tony, I've previously checked the connection to the DHW thermister and even had a mutimeter on it to check if the resistance matches up to the figures in the manual for a given temp. All looks ok. You have confirmed my suspicion that there are only two parts to the problem, the sensor...

Yesterday went the same as the night before, nothing to report really. However today the boilers been on all day and tonight it's started display a 'd' and breifly fireing the burner every 20 minutes or so. The output pipe is cold and to be certain I've closed off the isolation valve to stop the...

Here goes. Switched it on at 6pm after being off all day. After it settled down and the LCD displayed '0' I drew off a small amount of hot water to make sure I'd be checking the right pipe from the boiler. Nothing happend for three hours then finally it went through a pre-heat cycle and...

It does display a 't' on the display when it needs to heat the plate up, but mostly a 'D' as if water is being drawn off. I'll do the tests, but this has been going on for quite a while now and i'm pretty certain it's not the pipework. It's only a small bungalow and all the hot water pipes are...

Hi, For quite a while now my ISAR M30100 has been playing up. Everything works, but every so often the boiler briefly fires up and displays a D on the LCD as if hot water is being drawn off. This can happen every five minutes and is worse after running a bath. There are no leaks and no...