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    Vaillant combi, danfoss thermo. Sometimes heating does not come on.

    Alkali. DuracellPlus. AA. (although I needed to add a small amount of folded aluminium foil at each end to tighten things, as the batteries seemed a bit loose).
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    Vaillant combi, danfoss thermo. Sometimes heating does not come on.

    OK , been a while now since I made this post. Just came back from 2 days away, clicked the up button on thermo, wouldn't start the boiler. I went up, thermo 6 inches from receiver, pressed again, wouldnt start. The display on thermo looked fine, there was a little flame icon. I pressed the...
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    Vaillant combi, danfoss thermo. Sometimes heating does not come on.

    Thanks! Just a matter of waiting now. I don't think it's interference, since it is guaranteed to not work if I have been away for a week. The cover is wooden. I'm not sure if the cover makes any difference, as it works quite normally most of the time. Just speculating : is it possible that...
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    Vaillant combi, danfoss thermo. Sometimes heating does not come on.

    I just found the receiver (never knew it was there in all the five years we had the boiler), On wall above the boiler, near extractor pipe - behind a covering. I clicked up on thermo, and there was a click from the receiver. Think one of the lights of the receiver came on.
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    Vaillant combi, danfoss thermo. Sometimes heating does not come on.

    I wil try to get the S code next time as it happens rarely, except for when returning after a week away on holiday when the heating does not come on for at least 24 hours when manually pressing up or down. (I don't think there are any timer events)
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    Vaillant combi, danfoss thermo. Sometimes heating does not come on.

    Thermo just crashed, the buttons not responding at all, and it seems to display numbers even without batteries (internal battery keeps it going for a bit I'm guessing. Crash must have happened while probing around. Anyway, hard reset done, back to normal.
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    Vaillant combi, danfoss thermo. Sometimes heating does not come on.

    Sorry dude, don't know where the receiver is. When you say "pressing any rectangle button to wake screen up", do you mean the buttons and screen on the boiler itself? As for heating temperature up high enough on boiler display, I don't know. What should it be?
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    Vaillant combi, danfoss thermo. Sometimes heating does not come on.

    Thanks - just followed your advice 2 minutes ago: I used the probes across one AA while both AAs were in the thermo and clicked up to get it transmitting, meter displayed 1.52v. Oddly enough , sometimes went to 1.53v. Tried across both batteries, got 3.07v. Interestingly enough, hard to get the...
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    Vaillant combi, danfoss thermo. Sometimes heating does not come on.

    I can see two wires but not sure I can get to where they go.
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    Vaillant combi, danfoss thermo. Sometimes heating does not come on.

    Took these, let me know if you need more. Thanks for your help btw.
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    Vaillant combi, danfoss thermo. Sometimes heating does not come on.

    Just tested the two duracell AAs on a voltmeter, dishing out 1.5v each. (Brand new ones I have tested at 1.6 each) , so I dont think there's anything wrong with the AAs. How to tell if the receiver is responding? Isn't it inside the boiler itself?
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    Vaillant combi, danfoss thermo. Sometimes heating does not come on.

    I have a Vaillant combi (kitchen) and a danfoss thermo (not n wall, I leave it lying around). Sometimes the boiler does not come on for the heating for a long time (hot water fine). Eg now it's pretty chilly this morning, the heating is not on. I press up on the Danfoss until it shows 20.5 ...
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    Internal door flap (brass) needs cutting, what kind of service can do it?

    I can't now because I've glued the brushes over it. Basically, the hole in the door is 5 inches wide, 2 inches high. the door thickness is just under two inches. Because of the panelling on the door, the max width of the flap is about 10 inches. I did actually order a custom-made flap, but I...
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    Internal door flap (brass) needs cutting, what kind of service can do it?

    I have a good quality brass internal door flap / tidy / whatever it is called, and it is too wide. It needs to be cut, so that it is an inch more narrow. What kind of professional service should I search for to do a good job? nb I am in South London. In case anyone wants to know, it is a very...
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    Screws / rawl plugs required to hang a coat rack - brick wall?

    Brilliant, thanks mate, and thanks to everyone else.
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    Screws / rawl plugs required to hang a coat rack - brick wall?

    just to confim guys, wood screws ok to use for my scenario?
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    Screws / rawl plugs required to hang a coat rack - brick wall?

    As someone who's dabbling in this kind of thing for the first time, I couldn't say. However, I would off you a (albeit completely unqualified, baseless) guess that, if it hasn't fallen off by now, your things are unlikely to fall off any time soon.
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    Screws / rawl plugs required to hang a coat rack - brick wall?

    Thanks Foxhole - good advice, very much appreciated, but not possible on this item.
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