Still got boiler problems

"Dave Plowman (News)" wrote

Hot water cylinder thermostat not switching properly and allowing residual current through?

What sort of plan is the system? Just wondering if there's some point where there's no flow path and the boiler is still firing.

Doesn't use a thermostat - just a solid state sensor. Same as the room and outside one in principle. It measures ok and the display is giving the actual water temp just fine. They are usually pretty reliable devices - at least for several years. They're the same sort of thing as used to measure the coolant temp in your car for the engine management.

"Dave Plowman (News)" wrote

So its a thermistor then. It doesn't mean it isn't leaky though. Ask any Glow-Worm micron owner how reliable the thermistor has been in their boiler.

I would measure the voltage across the device when it's calling for heat for hot water, again when the demand has been met due to reaching temperature, and then once more after a system reset with just the heating calling for heat and compare. Could be nothing, but it's a good place to start, no?

If the mainboard has been changed, it's something auxiliary to it, so what's left? Heating 'stat (thermistor), hot water 'stat, diverter valve, what else? Bad earth?

Glow-Worm micron owner how reliable the thermistor has

Of course it's "leaky", thats how thermistors work.

That could make your eyes water... ;-)

If the sensor was faulty, wouldn't the temp readout be wrong? (you can call up all the various temperatures on the programmer. Inside, outside, boiler, hot water, etc.

I simply measured its resistance at cold and hot. Agreed with what I'd expect - although I don't have the actual figures for this one, only car ones.

The programmer has a second microprocessor which talks to the main one. I also have a zone programmer in the kitchen which talks to them both. Although that doesn't control the hot water - apart from switching it on or off.

;-) Guess he must be a plumber. Wouldn't suit them as there's more than just an on/off switch.

Some of the new WB models do not even have an on/off switch:-)

Adam

"ARWadsworth" wrote

The only trouble free boiler currently in manufacture. One that you can't turn on in the first place :)

Phil

Same as Rangers then. Or Celtic.

I told this plantpot not to buy one of these boilers. I hope It breaks down every month now.

This plonker has a *very* short memory. They were his flavour of the month once as Google would easily show. However, I didn't let his 'recommendation' put me off buying a good product.

Do us all a favour dribble and go back to playing with yourself until the next election.

I told you not to buy THAT model!!!! A told you want to do, but you ignored it all. You deserve what you get you plantpot. Now eff off.

Of course you did - it's not one of your evil combis. Now tell your nurse to tuck you up again until the next election. If your liver hasn't given out by then.