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Slight misunderstanding. There is nothing wrong with the three-way vave (I had to replace the head on that last year). The problem appears to have been on the Honeywell valve in the line from the HW side of the three-way valve to the HW tank. I'm not sure why this is there at all. I believe it...

Hi All Thought I would post a final (I hope) message on this problem as it might be of interest to others. I have been away on holiday for a while and, to my surprise, the boiler was still working on my return. I had left it on twice a day with the HW off. However, on returning the system to...

I left the pump on setting three, which I presume is the fastest speed, on the assumption that the fastest throughput of water will result in the lowest temperature rise through the boiler. The boiler ran perfectly today from startup this morning until late afternoon, when it tripped on...

Wow. You guys are keeping me on my toes. I thought I had it cracked, but nothing is happening as I expected. The boiler is still running (11:20) and hasn't tripped yet. I have an open mind about the pump. I thought that, as it was clearly pumping the water, all was well. I now accept that maybe...

Thanks for the speedy replies dean and stem - you've caught me in time to stop me rushing out to buy new flow thermistor and safety thermostat. I have judged the pump to be OK as it is definately shifting the water - all the radiaters get up to full temperature as quick as they always have. I...

Fingers crossed didn't work. The boiler tripped again on overheat last night. After a while I was able to restart the boiler, which was still running when it stopped at 10:30 pm on the timer. As I expected, it fired up at 6:30 am on the timer and is still running as I write this (at 8:50). It...

No. I knew it wasn't the pump, as the pump has been running throughout and it has obviouisly been moving the water judging by the temperature of the adjacent pipes. Cutting a long story short, it was the PCB. I eventually realised that I would have to work through the tests on the 'overheat...

Further update: The boiler has tripped again and probably did so soon after I last restarted it. The situation now is that if I restart the boiler after a trip, it runs for a while and the a banging occurs in the boiler and it trips out. It sounds as if the water in the boiler is starting to...

As you were! The boiler has just tripped again and this time it makes more sense. I find it difficult to believe that my memory of the lights last time was completey wrong, but this time the red light was flashing and the power light was on. Rather than embark on the sequence of tests in the...

Thanks for that. I also am puzzled as to why the mains light was off and yet the lockout light was on permanantly. When I pressed the lockout button the mains light came on straight away and the ''Boiler On'' light followed shortly after. I have been unable to find any information covering the...

I have a Baxi Solo HE boiler and yesterday evening, for no apparent reason, the boiler tripped out. Both HW and CH lights on the controller were on, the lockout light on the boiler was on and the ''Mains On'' and ''Boiler On'' lights were both out. I pressed the lockout switch, the power light...

Thanks for the advice. I have taken photos, but while I was doing so, I worked the inner plunger in and out vigorously several times and it seems to have improved things. I am going to have a shower and see if it is now OK. If not, I shall send the photos to the shower doc. Thanks again.

The mixer tap in my shower cubicle appears to be faulty. For the last few days it has not been possible to get the water temperature high enough. We have been in this house for 7 years and this is the first time we have had a problem. There does not appear to be any maker's name on the unit but...

With some embarrassment I can report that the oven is fixed. Turns out that the timer had not been reset after a power outage and the oven will not work until the timer is set. Sorry about that, but all's well that ends well.

My Zanussi cooker suddenly stopped working. Neither oven element nor grill will heat up. As I had suspected the thermostat previously, not controlling at the right temperature, I thought it might be the problem as it controls both the oven and the grill temperatures. I replaced the thermostat...

Thanks for putting me straight on that one. However, I think it still leaves my hypothesis as to a possible cause of the problem valid. As I switch off the power, the valve moves to the HW position (not the mid as I said) and then moves back to the CH position as I switch the power back on...

I'm now swamped with information - and thanks to everyone for that. At risk of boring everyone to death, I'll drag this out a little further. Ive not really carried out much checking as I've been waiting for the fault to recur. I've had the valve actuator off and removed the motor. The valve...

Sorry about delay in responding, but got diverted. System working OK incidentally. Can't see a maker's name on the valve but it says Mid Position Automatic Code BGMVSP - 23 on the cover. British Gas I suppose. The problem occurs with both CH and HW switched on by the controller and certainly...

You're right of course Agile, except that I don't know it's going to last 15 months. I like to go to warmer climes on holiday during winter months, which is just when the system will chose to pack up. Probably the best thing to do, as I obviously have a suspect system, is to replace the head of...