I have a problem with my central heating wireless thermostat on my Combi boiler. The boiler will start the heating on its own even though the thermostat is in the off position and no comfort setting has been selected. It will then not switch off until you switch the boiler mains supply off and on. It will also on occasion continue to stay on when the temperature is reached on the thermostat, or the shut off time cycle and requires to be shut off from the mains switch also. It now has a problem that the boiler will not light for a long time for the heating when overridden outside the setting times. The thermostat control is indicating that the system is running for heating and the low battery indicator is not lit. The receiver box has only the red light on and does not display any yellow or green calling lights for a long time and then it will just come on. The system is an Ariston Genus HE 30 and the Thermostat is a CELECT COR908WHB-3-RF/B which consists of COR908WHB-3-Tr Control centre and a COR2000WHB-Re receiver. Before I start going into buying a new Thermostat could the problems be that there is an outside interference affecting my address code setting and switching it on or even though the control set is not indicating the battery is low could it be a battery fault in the control unit causing these weird problems.
Combi Boiler wireless thermostat problems
- Thread starter bobajob100
- Start date
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Deleted.
(Silly me. I misread the post!)
(Silly me. I misread the post!)
433 MHz is in all probability the problem..Many many different users use this frequency, which is allocated on a primary user basis to the military with radio amateurs as secondary users.
I have just had a combi boiler fitted myself & as a radio amateur had the control hard wired for this very reason.
Your remote uses 100 milliwatts at most & even my small handheld radio uses 50 times more power than that & my base station runs at up to 100 watts with an antenna gain that mulitplies that to close to 1500 watts Effective Radiated Power.
So with all sorts of remote controls for garages, gates, car key fobs & many many other low power devices, it's not a sensible place to operate something that needs to be reliable.
Car key fobs believe it or not operate at 433.920 khz, right in the middle of the amateur radio digital band. I don't know what you have locally but even my 5 watt handheld radio jams car key fobs at 500 yards, so the same would be true for your heating system..But don't blame amateurs or the military..We are the licenced users.
I have just had a combi boiler fitted myself & as a radio amateur had the control hard wired for this very reason.
Your remote uses 100 milliwatts at most & even my small handheld radio uses 50 times more power than that & my base station runs at up to 100 watts with an antenna gain that mulitplies that to close to 1500 watts Effective Radiated Power.
So with all sorts of remote controls for garages, gates, car key fobs & many many other low power devices, it's not a sensible place to operate something that needs to be reliable.
Car key fobs believe it or not operate at 433.920 khz, right in the middle of the amateur radio digital band. I don't know what you have locally but even my 5 watt handheld radio jams car key fobs at 500 yards, so the same would be true for your heating system..But don't blame amateurs or the military..We are the licenced users.
Google shows..
https://docs.google.com/viewer?a=v&...HK_6wu&sig=AHIEtbRxxI5cKvLFsYKtXF0Jd_1qo9cVUQ
Frequency 433 mhz.
https://docs.google.com/viewer?a=v&...HK_6wu&sig=AHIEtbRxxI5cKvLFsYKtXF0Jd_1qo9cVUQ
Frequency 433 mhz.
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Might help if you were to move the Tx closer to the Rx, it may be that your signal isn't very strong given the fact all these low power Remote controlled devices rarely reach the specified distance as that distance is quoted in free space and free from heavy electrical and radio interference. They rarely work 100% even from as close as 30 meters indoors.
So either bring the receiver closer to the Transmitter (thermostat) or take your thermostat closer to the receiver, which i presume is wired close to the boiler, but you can run a short lead from the boiler to the receiver at a more convenient spot or take your thermostat closer to the boiler, which is much easier, but may not be ideal spot as far as thermal path is concerned for the thermostat to read average temperature changes.
So either bring the receiver closer to the Transmitter (thermostat) or take your thermostat closer to the receiver, which i presume is wired close to the boiler, but you can run a short lead from the boiler to the receiver at a more convenient spot or take your thermostat closer to the boiler, which is much easier, but may not be ideal spot as far as thermal path is concerned for the thermostat to read average temperature changes.
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