vampire Posted February 8, 2019 Report Share Posted February 8, 2019 Daughter has a, ideal isar combi 30 he. Its showing fault code L9 and then goes to lock out with 3 horizontal dashes after pressing reset, showing its over heated. Boiler is 13 years old and system is about to be cleaned out as I don't think boiler has had a proper service for years ? Have done the following, but still not going; 1,cleaned plate heat exchanger with acid, which was obstructed 2,removed pump checked/cleaned/bled 3,cleaned condensate trap, which was blocked and checked pipe and boiler connection 4,cleaned sump, which was like a half full coal bunker ? 5,checked diverter valve and plunged needle in/out 6,replaced all 3 thermista and the dry side thermista at top of boiler 7,replaced pcb (second hand), it fired and ran long enough to fully heat rads and steaming hot water (so flue is clear),then L9 8,system is filled to 1 bar pressure and bled and cleanser added all valves open when it fires up after its cooled down to below 55 degrees,it runs for 1 minute gets warm in boiler casing and then cuts out,pressure goes from 1 bar upto 2.5 bar ? Only thing I can think of next, is smash it to bits, check continuity of termista/pcb, poss heat exchanger blocked as lack of proper service it could be blocked ? boiler control panel ? ANYWAY,GUYS HELP ,I have exhausted my knowledge, my mate who is gas safe only suggestion was scrap it,so not very helpful, we did tell her when she bought the place that boiler is **** and wouldn't last long, but at £600 quid for a replacement is not an expense she needs right now as its her first house. Thanks. Quote Link to comment Share on other sites More sharing options...
GingerCat Posted February 8, 2019 Report Share Posted February 8, 2019 (edited) My advice is not to mess about with gas boilers as they can easily go wrong and kill you. Get it serviced professionally and see what the guy says. It may be something simple like a diaphram or pump or something more serious. Either way I wouldn't want it in my house if it was in the condition you describe as carbon monoxide isint funny. When I had a gas combi it was 70 quid servicing once a year and they would change a part free as part of that. Every other year it would need something. Normally due to the hard water we had. Edited February 8, 2019 by GingerCat Quote Link to comment Share on other sites More sharing options...
oldypigeonpopper Posted February 8, 2019 Report Share Posted February 8, 2019 1 minute ago, GingerCat said: My advice is not to mess about with gas boilers as they can easily go wrong and kill you. Get it serviced professionally and see what the guy says. It may be something simple like a diaphram or something more serious. Either way I wouldn't want it in my house if it was in the condition you describe as carbon monoxide isint funny. When I had a gas combi it was 70 quid servicing once a year and they would change a part free as part of that. Every other year it would need something. Normally due to the hard water we had. hello, i live in a hard water area, many years ago i discovered some interesting research on the use of enclosed magnets on cold water pipes and gas pipes so i bought 2 and put them under the gas boiler and they do keep the internal water system clean and not sure how it worked on gas but the boiler lasted many years without any problems, the property is now my sons and we replaced the boiler 2 years ago and put the magnets back and a recent service showed a clean system, i also put 4 magnets on the water pipe coming into the property under the sink and an example the kettle seems to be much cleaner, anyway worth a thought Quote Link to comment Share on other sites More sharing options...
Guest Posted February 9, 2019 Report Share Posted February 9, 2019 (edited) Is the wall thermostat faulty .join the wires together and see if boiler continues to run .mine did it once Edited February 9, 2019 by Guest Quote Link to comment Share on other sites More sharing options...
seph234 Posted February 9, 2019 Report Share Posted February 9, 2019 Have you checked the pressure in the expansion vessel? Quote Link to comment Share on other sites More sharing options...
Winston72 Posted February 9, 2019 Report Share Posted February 9, 2019 either the expansio vessel or the flex to the exspanison vessel, easy test, isolate one radiator and drain it completely, open valves re pressurise the system DO NOT BLEED THE RADIATOR and fire the system up, the empty radiator acts like an expansion vessel,if the system runs fit an external pressure vessel, less than 30 quid at screwfix, however the isar is a pile of poop ,look at replacing it when finances allow Quote Link to comment Share on other sites More sharing options...
LondonLuke Posted February 9, 2019 Report Share Posted February 9, 2019 15 hours ago, vampire said: Daughter has a, ideal isar combi 30 he. Its showing fault code L9 and then goes to lock out with 3 horizontal dashes after pressing reset, showing its over heated. Boiler is 13 years old and system is about to be cleaned out as I don't think boiler has had a proper service for years ? Have done the following, but still not going; 1,cleaned plate heat exchanger with acid, which was obstructed 2,removed pump checked/cleaned/bled 3,cleaned condensate trap, which was blocked and checked pipe and boiler connection 4,cleaned sump, which was like a half full coal bunker ? 5,checked diverter valve and plunged needle in/out 6,replaced all 3 thermista and the dry side thermista at top of boiler 7,replaced pcb (second hand), it fired and ran long enough to fully heat rads and steaming hot water (so flue is clear),then L9 8,system is filled to 1 bar pressure and bled and cleanser added all valves open when it fires up after its cooled down to below 55 degrees,it runs for 1 minute gets warm in boiler casing and then cuts out,pressure goes from 1 bar upto 2.5 bar ? Only thing I can think of next, is smash it to bits, check continuity of termista/pcb, poss heat exchanger blocked as lack of proper service it could be blocked ? boiler control panel ? ANYWAY,GUYS HELP ,I have exhausted my knowledge, my mate who is gas safe only suggestion was scrap it,so not very helpful, we did tell her when she bought the place that boiler is **** and wouldn't last long, but at £600 quid for a replacement is not an expense she needs right now as its her first house. Thanks. After all the fiddling you have done (which I wouldn’t recommend) my guess would be the only important is in bold. Any gas engineer worth their salt would start at the expansion vessel based on this alone - surprised your mate didn’t twig to that as the very first suggestion. And they say hiring a professional is expensive...if the expansion vessel is the fault it will be a lot cheaper to replace/install than all you have done already... 14 hours ago, oldypigeonpopper said: hello, i live in a hard water area, many years ago i discovered some interesting research on the use of enclosed magnets on cold water pipes and gas pipes so i bought 2 and put them under the gas boiler and they do keep the internal water system clean and not sure how it worked on gas but the boiler lasted many years without any problems, the property is now my sons and we replaced the boiler 2 years ago and put the magnets back and a recent service showed a clean system, i also put 4 magnets on the water pipe coming into the property under the sink and an example the kettle seems to be much cleaner, anyway worth a thought Not sure if I misunderstand but are you trying to delimescale your gas supply?! Quote Link to comment Share on other sites More sharing options...
B725 Posted February 9, 2019 Report Share Posted February 9, 2019 If the pressure is rising to 2.5 bar in a minute it's more likely to be the expansion vessel, or there maybe crossover water pressure from the hot water. Try what Winston said but at 13 year old combi I would not chuck another penny at it. Quote Link to comment Share on other sites More sharing options...
oldypigeonpopper Posted February 9, 2019 Report Share Posted February 9, 2019 1 hour ago, LondonLuke said: After all the fiddling you have done (which I wouldn’t recommend) my guess would be the only important is in bold. Any gas engineer worth their salt would start at the expansion vessel based on this alone - surprised your mate didn’t twig to that as the very first suggestion. And they say hiring a professional is expensive...if the expansion vessel is the fault it will be a lot cheaper to replace/install than all you have done already... Not sure if I misunderstand but are you trying to delimescale your gas supply?! hello, i hardly think so, i would take a look on google , using magnets on water and natural gas pipes, i have been using these devices for over 20 years, Quote Link to comment Share on other sites More sharing options...
blackbird Posted February 9, 2019 Report Share Posted February 9, 2019 Have a look on YOUTUBE Frank Spencer blows up boiler 😂 Quote Link to comment Share on other sites More sharing options...
vampire Posted February 9, 2019 Author Report Share Posted February 9, 2019 17 hours ago, oldypigeonpopper said: hello, i live in a hard water area, many years ago i discovered some interesting research on the use of enclosed magnets on cold water pipes and gas pipes so i bought 2 and put them under the gas boiler and they do keep the internal water system clean and not sure how it worked on gas but the boiler lasted many years without any problems, the property is now my sons and we replaced the boiler 2 years ago and put the magnets back and a recent service showed a clean system, i also put 4 magnets on the water pipe coming into the property under the sink and an example the kettle seems to be much cleaner, anyway worth a thought All my boiler installs have a magnet/sludge filter,its part of the warranty. 8 hours ago, Swinton said: Is the wall thermostat faulty .join the wires together and see if boiler continues to run .mine did it once Not tried that,thanks. 7 hours ago, seph234 said: Have you checked the pressure in the expansion vessel? Yes,thats one of first things I did,was low pumped up to 1 bar and its holding,but with pressure rise its first thing I would assume is bladder gone. 4 hours ago, Winston72 said: either the expansio vessel or the flex to the exspanison vessel, easy test, isolate one radiator and drain it completely, open valves re pressurise the system DO NOT BLEED THE RADIATOR and fire the system up, the empty radiator acts like an expansion vessel,if the system runs fit an external pressure vessel, less than 30 quid at screwfix, however the isar is a pile of poop ,look at replacing it when finances allow pipe to expansion vessel and connection to heat exchanger are clear,would fit external to boiler expansion vessel as its a boiler off wall to fit ideal one. 2 hours ago, B725 said: If the pressure is rising to 2.5 bar in a minute it's more likely to be the expansion vessel, or there maybe crossover water pressure from the hot water. Try what Winston said but at 13 year old combi I would not chuck another penny at it. Not sure what crossover water pressure is. Thanks for all the replies,gives me some scope before I scrap it. Quote Link to comment Share on other sites More sharing options...
vampire Posted February 9, 2019 Author Report Share Posted February 9, 2019 2 hours ago, LondonLuke said: After all the fiddling you have done (which I wouldn’t recommend) my guess would be the only important is in bold. Its an Ideal boiler so its only ever scrap Any gas engineer worth their salt would start at the expansion vessel based on this alone - surprised your mate didn’t twig to that as the very first suggestion. done that,it was under pressure but is holding 1 bar now. And they say hiring a professional is expensive...if the expansion vessel is the fault it will be a lot cheaper to replace/install than all you have done already... yeah I know,i am a professional and my labour is free as its our/her boiler and all new parts were returned for credit,so cost is £30 so far. Quote Link to comment Share on other sites More sharing options...
LondonLuke Posted February 9, 2019 Report Share Posted February 9, 2019 2 hours ago, oldypigeonpopper said: hello, i hardly think so, i would take a look on google , using magnets on water and natural gas pipes, i have been using these devices for over 20 years, Just not sure what a magnet is going to do to gas? Quote Link to comment Share on other sites More sharing options...
Westley Posted February 9, 2019 Report Share Posted February 9, 2019 8 minutes ago, LondonLuke said: Just not sure what a magnet is going to do to gas? It only works on Natural Gas, BUT, it smooths out the flow as the tides come in and go out, I think ! 🤔 Quote Link to comment Share on other sites More sharing options...
oldypigeonpopper Posted February 9, 2019 Report Share Posted February 9, 2019 1 hour ago, vampire said: All my boiler installs have a magnet/sludge filter,its part of the warranty. Not tried that,thanks. Yes,thats one of first things I did,was low pumped up to 1 bar and its holding,but with pressure rise its first thing I would assume is bladder gone. pipe to expansion vessel and connection to heat exchanger are clear,would fit external to boiler expansion vessel as its a boiler off wall to fit ideal one. Not sure what crossover water pressure is. Thanks for all the replies,gives me some scope before I scrap it. hello, these magnet units fit onto the water and gas pipes under the boiler Quote Link to comment Share on other sites More sharing options...
oldypigeonpopper Posted February 9, 2019 Report Share Posted February 9, 2019 1 minute ago, Westley said: It only works on Natural Gas, BUT, it smooths out the flow as the tides come in and go out, I think ! 🤔 hello, i am not sure how these work, not being a Scientist i think with the water the magnetic force breaks down the water impurities/ gas am not sure, you can buy these magnets on the bay although i bought the ones under my sons boiler 20 years ago, since then i have fitted 4 on my sons incoming water pipe. Quote Link to comment Share on other sites More sharing options...
Westley Posted February 9, 2019 Report Share Posted February 9, 2019 There was certainly a lot of moisture in the old Coal Gas, so much so, you had to install syphon legs in pipe installations, to collect and then drain the water/gas oil away. Quote Link to comment Share on other sites More sharing options...
B725 Posted February 9, 2019 Report Share Posted February 9, 2019 2 hours ago, vampire said: All my boiler installs have a magnet/sludge filter,its part of the warranty. Not tried that,thanks. Yes,thats one of first things I did,was low pumped up to 1 bar and its holding,but with pressure rise its first thing I would assume is bladder gone. pipe to expansion vessel and connection to heat exchanger are clear,would fit external to boiler expansion vessel as its a boiler off wall to fit ideal one. Not sure what crossover water pressure is. Thanks for all the replies,gives me some scope before I scrap it. The water from the hot water side can get into the heating side its rare it happens. Quote Link to comment Share on other sites More sharing options...
activeviii Posted February 9, 2019 Report Share Posted February 9, 2019 I know it's on your list but it's a common fault and even though you have tested it I would look at borrowing a pump and just swap it out temporary. It was a common fault on the 24le and they suck air giving you the exspantion vessel misread Quote Link to comment Share on other sites More sharing options...
aga man Posted February 10, 2019 Report Share Posted February 10, 2019 I would also suspect the water pump, especially if the thermistors have been changed. Pump can seem fine when cold but slow down and almost stop when they get hot. I would only try a second hand head though, the boiler is not worth spending money on. Worst boiler Ideal ever made! Quote Link to comment Share on other sites More sharing options...
vampire Posted February 10, 2019 Author Report Share Posted February 10, 2019 21 hours ago, activeviii said: I know it's on your list but it's a common fault and even though you have tested it I would look at borrowing a pump and just swap it out temporary. It was a common fault on the 24le and they suck air giving you the exspantion vessel misread thanks that makes sense. 5 hours ago, aga man said: I would also suspect the water pump, especially if the thermistors have been changed. Pump can seem fine when cold but slow down and almost stop when they get hot. I would only try a second hand head though, the boiler is not worth spending money on. Worst boiler Ideal ever made! Thanks,will do that I have a couple will swap it out.Yes this model is carp You gave me words of encouragement when I first set out on my boiler course many years ago now,thankyou. Quote Link to comment Share on other sites More sharing options...
vampire Posted February 13, 2019 Author Report Share Posted February 13, 2019 Given up,now going for spares and repairs,new boiler coming Friday. Swapped pump,L9 so created air in upper rad,L9.So thinking it might be main heat exchanger/aluminium scrap. Anyone want a load of ideal isar he 30, spares ? Quote Link to comment Share on other sites More sharing options...
Winston72 Posted February 13, 2019 Report Share Posted February 13, 2019 Only some other unfortunate with the dreaded isar/esprit2 Quote Link to comment Share on other sites More sharing options...
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