andy mccord Posted September 29, 2015 Share Posted September 29, 2015 Hi , can anyone tell me whether when you select full power on this boiler, both elements heat up or just the higher rated element? TIA Andy Link to comment Share on other sites More sharing options...
Colin Leake Posted September 29, 2015 Share Posted September 29, 2015 As I understand it both. Just a little tip if you are using the higher heat setting set the fan to run at its highest speed to help prevent the boiler unit overheating. Fitter told me to do this when he replaced an overheated main circuit board under warrenty. Link to comment Share on other sites More sharing options...
andy mccord Posted September 30, 2015 Author Share Posted September 30, 2015 Thanks Colin, just checking because I suspect the main element has blown but it still heats water set on the highest setting...only it now takes 1 hour to get to 60c :-( Regards Andy Link to comment Share on other sites More sharing options...
markh1 Posted September 30, 2015 Share Posted September 30, 2015 I had exactly the same problem, I changed both elements and it was cured, both elements are the same and its a surprisingly straightforward job to do, took me less than 2 hours including taking the combi out of the van and onto the bench You can get the elements from leisureshopdirect Link to comment Share on other sites More sharing options...
andy mccord Posted September 30, 2015 Author Share Posted September 30, 2015 Hi mark, My boiler is in a nightmare position so I've opted to let the dealership to it, I believe they are £100 for the pair 8-) van goes in this friday, but I'm undecided whether to have the lower output element changed or not which is why I asked whether they are both powered up when selecting full power Regards Andy Link to comment Share on other sites More sharing options...
ken the kontiki Posted September 30, 2015 Share Posted September 30, 2015 I'd change both whilst the boiler is out. Sod's law says that when one has failed the other will follow. Why pay two lots of labour? Link to comment Share on other sites More sharing options...
Colin Leake Posted September 30, 2015 Share Posted September 30, 2015 It may well be possible to replace the elements without removing the boiler. Check with your dealer. If the price you've mentioned includes the replacement I'd go for both. My dealer las me element failure on these boilers is quite common. Link to comment Share on other sites More sharing options...
markh1 Posted October 1, 2015 Share Posted October 1, 2015 andy mccord - 2015-09-30 4:28 PM Hi mark, My boiler is in a nightmare position so I've opted to let the dealership to it, I believe they are £100 for the pair 8-) van goes in this friday, but I'm undecided whether to have the lower output element changed or not which is why I asked whether they are both powered up when selecting full power Regards Andy So is mine, buried in a cupboard, but turned out to be really easy to remove, I certainly wouldn't pay a half assed dealer to do it, both elements will cost more than £100, thick end of £400 from a dealer I think Link to comment Share on other sites More sharing options...
markh1 Posted October 1, 2015 Share Posted October 1, 2015 Colin Leake - 2015-09-30 7:20 PM It may well be possible to replace the elements without removing the boiler. Check with your dealer. If the price you've mentioned includes the replacement I'd go for both. My dealer las me element failure on these boilers is quite common. Take it from me, you can't change the elements without removing the boiler Link to comment Share on other sites More sharing options...
markh1 Posted October 1, 2015 Share Posted October 1, 2015 ken the kontiki - 2015-09-30 5:21 PM I'd change both whilst the boiler is out. Sod's law says that when one has failed the other will follow. Why pay two lots of labour? Absolutely change both they both the same, there isn't a high or low element Link to comment Share on other sites More sharing options...
andy mccord Posted October 1, 2015 Author Share Posted October 1, 2015 Well I can tell you that one morning the wife turned on the boiler on full power then realised 10 mins later that something had tripped the RCB, I reset it and switched the boiler back on, it took 1 hr to heat the water to 60c were as usually it takes 20 mins, So I concluded the hi power element had failed, it continues to heat water but much slower so I presume that it must have 2 elements?? Regards Andy Link to comment Share on other sites More sharing options...
markh1 Posted October 1, 2015 Share Posted October 1, 2015 andy mccord - 2015-10-01 1:04 PM Well I can tell you that one morning the wife turned on the boiler on full power then realised 10 mins later that something had tripped the RCB, I reset it and switched the boiler back on, it took 1 hr to heat the water to 60c were as usually it takes 20 mins, So I concluded the hi power element had failed, it continues to heat water but much slower so I presume that it must have 2 elements?? Regards Andy Yes it has 2 elements, they are both the same though, there isn't a high power and low power element, just 2 the same see: http://www.leisureshopdirect.com/caravan/water/product_37843/heating_element_for_truma_combi_4e__6e.aspx Link to comment Share on other sites More sharing options...
Derek Uzzell Posted October 2, 2015 Share Posted October 2, 2015 My understanding is that the two elements normally act together not independently. Basically, when the 900W setting is chosen each element outputs 450W, and when the 1800W setting is chosen each element outputs 900W. As markh1 advises it will not be possible to replace the elements while the Combi is in situ, and it would be wise to replace both elements when the heater has been disassembled. Link to comment Share on other sites More sharing options...
Keithl Posted October 2, 2015 Share Posted October 2, 2015 Derek, So if one element has 'blown' why does the heater still operate at reduced power? I am assuming the reduction in power is accomplished by series/parallel switching, is my assumption correct? Keith. Link to comment Share on other sites More sharing options...
Colin Leake Posted October 2, 2015 Share Posted October 2, 2015 markh1 - 2015-10-01 12:10 AM Colin Leake - 2015-09-30 7:20 PM It may well be possible to replace the elements without removing the boiler. Check with your dealer. If the price you've mentioned includes the replacement I'd go for both. My dealer las me element failure on these boilers is quite common. Take it from me, you can't change the elements without removing the boiler That must depend on the installation, my dealers workshop tells me it can often be done. Since element failure is not uncommon some converters make sure the installation makes it possible. For the record both elements are identical. On the low power setting only one is switched in one the high power setting both are switched on. If one has failed you will only get the 900 watts from the remaining element. Incidently don't try running the hot water and heating on the low setting. 900 watts simply can't cope. Link to comment Share on other sites More sharing options...
markh1 Posted October 2, 2015 Share Posted October 2, 2015 Colin, I promise you, you cannot replace the elements in situ, you have to strip both sides of the boiler off, which you can only do on the bench, check with any dealer, they'll confirm what I say Link to comment Share on other sites More sharing options...
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