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Thanks again REDSPARKY. The alarm didn't sound so it's good to know that I won't disturb the neighbourhood.

I got round to powering down today and the system has reset - thanks REDSPARKY. I'm going to replace the panel as suggested and thought I'd better replace the external alarm as well as they are the same age. Do I just have to put up with the external alarm sounding when I take the cover off? The...

Thanks. I haven't powered down yet, partly because I'm worried that if I do and the key pad still doesn't work the outside alarm will sound and I'll have to stop it somehow so I need a ladder and partly because I'm in the middle of mending my wife's car! I'll have a go at the weekend and...

Thank you. It looks like the flat membrane to me.

Thank you for that. However the keypad is dead - I can push buttons as much as I like but nothing happens.

The keypad on my AJ600 alarm is dead. Both fuses are intact, mains are connected, the battery is producing just over 14v when disconnected. When I removed the front cover of the panel the tamper alarm didn't sound. Has anyone any ideas to help please?

Using a mini digger through the small access would be a bit difficult I would have thought. I've suggested to various contractors that a filter on the end of their pipe would stop the rubble entering their equipment but they don't want to know. It's not worth the bother I imagine, after all...

Thanks for the reply. A dredge won't work because there is too much rubble in the sludge, also the access is only about 0.5M x 0.5M so swinging something into the corners also won't be possible. Thank you for your concern but I've already dug a few tons of rubble and dry 'sludge' out, plus...

I have a 2M x 2M x 4M deep septic tank in my garden, unused for years. I live in the south east and I'm certain we are going to have water shortages in the future so I intend running the rain water from my garage and various other places into it. It was nearly full of rubble, old iron and soil...

I went to my son's today and checked all the wiring thoroughly, making sure that it all went where it should and can find no problems. I had mis-labelled a couple of wires in the photo for which I apologise. I then went through the tests in 'Mid Position Valve Problems'. The diagnosis showed...

Gentlemen, I apologise, I don't seem to be doing a very good job of helping you help me. I'll print myself an enlarged copy of the photo of the wiring above and take it with me to my son's on Saturday. I'll bury my head deep in his airing cupboard (with a lead lamp) positively identify each wire...

A vist to my son's home today produced the following - A better quality photo of the wiring A photo of the room stat - there is nothing internally to identify it's type The wiring is 1 - red, 4 - empty, 3 - yellow, 2 - blue, 5 - nothing The cylinder stat is a Honeywell...

I'll furnish that info asap, thank you. Howard

Right, I thought that, it must be yellow from prog CH on and red to room stat, those two wires certainly go to those two places.. It's actually a bluey/green.

The connections up the middle are earths at the top and neutral at the bottom. I'm unable to list the connections as they are shown in the photo so - Top left hand strip red from prog CH on yellow to room stat black from prog HW off...

Photo for matt1e. I'll identify the wires tonight, no time this morning. Not too good quality I'm afraid as it's all behind the pipework and a bit difficult to access.

I can't go back to my son's until Saturday week so probably my best bet is to start all over again using D_Hailsham's fault finding info. Perhaps coming to it fresh will help! Thank you all for your input so far. I'll report back in ten days or so.

No power from the CH on terminal and I've checked the wiring for continuity from the on terminal through to the valve. It occurs to me that when my son told me his CH wasn't working I suggested that he gave the valve a bang in case it had stuck fron not being used all summer. This he did and...

I've worked my way through the electrical system and realised that there is no power from the CH 'on' wire from the programmer. I've linked it out so that 240v is available to the room stat and CH starts with no problem, whether HW is called for or not. I think I'm going to bring my identical...

I'll do that in the morning when I get to my son's house. Thank you.