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Central Heating tripping RCD?
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<blockquote data-quote="Phil Russell" data-source="post: 505967" data-attributes="member: 33396"><p>OK ... January 11 2021 UPDATE</p><p></p><p>Since my original post we have had our Central Heating people check out the system and found no faults. The electricians who work for the CH company came today and checked all the wiring around the 2 motorised valves and the pump and declared all was as it should be. They did not inspect wiring around the programmer.</p><p></p><p>So it is still a puzzle. Since my last post, the system has tripped a few times. On one occasion the RCD would not reset even when I switched the boiler off, which seems to eliminate the boiler. After an hour I tried to reset the system again and it reset OK. For the past two weeks we have heating and water set to come on and go off at different times. But it has not tripped in this time. Coincidence? </p><p></p><p>But, a question please. If the valves are declared OK and we can eliminate the boiler as above, does that indicate the programmer as the most likely culprit? The programmer is a Danfoss one which I believe uses a common backplate. But I can get the same make and model from Screwfix for around £50. The call outs to our CH servicing people does cost a visit fee (less than normal for service contracts) but the call outs mount up and I am thinking a cheaper option is simply to get a new programmer and plugging it in.</p><p></p><p>Am I missing a trick or is my logic sound? What would you do, apart from putting on another jumper?</p><p></p><p>Cheers, Phil</p></blockquote><p></p>
[QUOTE="Phil Russell, post: 505967, member: 33396"] OK ... January 11 2021 UPDATE Since my original post we have had our Central Heating people check out the system and found no faults. The electricians who work for the CH company came today and checked all the wiring around the 2 motorised valves and the pump and declared all was as it should be. They did not inspect wiring around the programmer. So it is still a puzzle. Since my last post, the system has tripped a few times. On one occasion the RCD would not reset even when I switched the boiler off, which seems to eliminate the boiler. After an hour I tried to reset the system again and it reset OK. For the past two weeks we have heating and water set to come on and go off at different times. But it has not tripped in this time. Coincidence? But, a question please. If the valves are declared OK and we can eliminate the boiler as above, does that indicate the programmer as the most likely culprit? The programmer is a Danfoss one which I believe uses a common backplate. But I can get the same make and model from Screwfix for around £50. The call outs to our CH servicing people does cost a visit fee (less than normal for service contracts) but the call outs mount up and I am thinking a cheaper option is simply to get a new programmer and plugging it in. Am I missing a trick or is my logic sound? What would you do, apart from putting on another jumper? Cheers, Phil [/QUOTE]
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