rawhide Posted May 31 Share Posted May 31 New fridge all ok, EHU problem is on my 2005 Burstner Elegance 681, gas and 12 v all good, put EHU on starts ok then after 18 minutes lights are flashing , tested off motorhome all good, any help appreciated regards Steve Quote Link to comment Share on other sites More sharing options...
Keithl Posted May 31 Share Posted May 31 Can you measure the voltage of the supply at the connections to the fridge? Or if not at a nearby mains socket within the MH? Maybe get a 'Mains power meter' to display the voltage??? https://www.amazon.co.uk/s?k=mains+power+meter Keith. 1 Quote Link to comment Share on other sites More sharing options...
rawhide Posted June 1 Author Share Posted June 1 Engineers spent 6 hours eliminating, no result Quote Link to comment Share on other sites More sharing options...
Derek Uzzell Posted June 1 Share Posted June 1 I notice that you made an enquiry at the end of April using exactly the same 'topic' title (New Thetford fridge freezer 4145E +) https://forums.outandaboutlive.co.uk/topic/65776-new-thetford-fridge-freezer-4145e/ but I'm not sure if the present problem relates to the Thetford fridge/freezer you were referring to back in April or to an under-warranty replacement fridge/freezer that was installed since April. Quote Link to comment Share on other sites More sharing options...
onecal Posted June 1 Share Posted June 1 (edited) Hi Have you an error code 8? Or what error code have you ? 5A AC glass fuse replaced and connection checked ?Did they replace the 240 v AC heater to start with after checking all connections and wiring for continuity first ? Regards Edited June 1 by onecal 1 Quote Link to comment Share on other sites More sharing options...
Derek Uzzell Posted June 1 Share Posted June 1 onecal Suggest you a) refer to rawhide's April enquiry and b) wait for feedback from him as to which Thetford fridge/freezer (original or replacement)is now involved. Quote Link to comment Share on other sites More sharing options...
onecal Posted June 1 Share Posted June 1 Ok We await his feedback, as you say! Regards Quote Link to comment Share on other sites More sharing options...
rawhide Posted June 2 Author Share Posted June 2 As I said, the fridge has been tested off motorhome and is faultless, forget fault codes , element etc, the problem is somewhere in my motorhome, which baffles the engineers, starts and cools then flashing lights, after 18 minutes, my question, does anyone know what this is, some questions irrelevant in previous replies, but thanks anyway , regards Steve Quote Link to comment Share on other sites More sharing options...
Keithl Posted June 2 Share Posted June 2 Have you monitored the mains voltage to see if that drops or ??? Or does the 12 volt supply time out? Quote Link to comment Share on other sites More sharing options...
rawhide Posted June 2 Author Share Posted June 2 Engineers did this, I am sure voltage was ok ,but not 100% Quote Link to comment Share on other sites More sharing options...
onecal Posted June 2 Share Posted June 2 (edited) Hi You say it works off your motorhome and is faultless ???? Ok so you really only need to check your supply to your motorhome for volt drop as it may be the issue.Check all connections from your supply to your fusebox also all connections and breakers within Your engineer should be able to this for you Of course as Keithl as mentioned your 12v supply may be a big issue if not powered up or staying powered up Easily checked with a meter to see if you actually have 12v.dc and does it drop off after the 18 minuets as you say. Best of luck with it Regards Edited June 2 by onecal 1 Quote Link to comment Share on other sites More sharing options...
rawhide Posted June 2 Author Share Posted June 2 Thanks for advise, I'm sure engineers did voltage checks , he put new CB on and plug socket to go direct to fridge from original set up, will keep all informed if when answer comes, cheers all and appreciated Quote Link to comment Share on other sites More sharing options...
onecal Posted June 2 Share Posted June 2 Hi So when you plug in your fridge outside of your motorhome ,is it a compete different circuit supply? Both AC and DC ? Regards Quote Link to comment Share on other sites More sharing options...
Keithl Posted June 2 Share Posted June 2 If he has only tested the mains power supply then he is probably missing a fault on the 12 volt feed. Try wiring the 12 volt feed directly back from the leisure battery bypassing any control panels, etc, etc. Quote Link to comment Share on other sites More sharing options...
onecal Posted June 2 Share Posted June 2 Hi Exactly , Quote Link to comment Share on other sites More sharing options...
Seth77 Posted June 3 Share Posted June 3 Check the 12V supply in your motorhome, as the issue might be a voltage drop or interruption there. Quote Link to comment Share on other sites More sharing options...
rawhide Posted June 3 Author Share Posted June 3 18 hours ago, onecal said: Hi So when you plug in your fridge outside of your motorhome ,is it a compete different circuit supply? Both AC and DC ? Regards Yes Quote Link to comment Share on other sites More sharing options...
rawhide Posted June 3 Author Share Posted June 3 18 hours ago, Keithl said: If he has only tested the mains power supply then he is probably missing a fault on the 12 volt feed. Try wiring the 12 volt feed directly back from the leisure battery bypassing any control panels, etc, etc. Are you saying do this to check or permanently wire this way, when first fitted ,it was wired like this, kept melting 20 amp fuse, new fitter ripped all out, Quote Link to comment Share on other sites More sharing options...
Keithl Posted June 3 Share Posted June 3 I meant only for a check. There should be two sets of 12 volt wiring going to the fridge. A pair of smaller sized wires to power the fridges control panel and a much larger sized pair to power the heating element and these should only be live when the engine is running (unless the fridge has a built in 'engine on' control). The larger pair should ideally be wired from a point as close as possible to the engine alternator, typically the starter battery positive is used and then fed via relay. I am suggesting wiring the smaller sized pair directly to the leisure battery, as a test only, to rule out any power supply issues on the control panel feed. If the 'previous wiring' was blowing a 20 Amp fuse then this suggests a fault somewhere in the circuit! Has the fuse blown since being rewired and, more importantly, how did the fitter rewire it? Keith. Quote Link to comment Share on other sites More sharing options...
rawhide Posted June 3 Author Share Posted June 3 (edited) 2 hours ago, Keithl said: I meant only for a check. There should be two sets of 12 volt wiring going to the fridge. A pair of smaller sized wires to power the fridges control panel and a much larger sized pair to power the heating element and these should only be live when the engine is running (unless the fridge has a built in 'engine on' control). The larger pair should ideally be wired from a point as close as possible to the engine alternator, typically the starter battery positive is used and then fed via relay. I am suggesting wiring the smaller sized pair directly to the leisure battery, as a test only, to rule out any power supply issues on the control panel feed. If the 'previous wiring' was blowing a 20 Amp fuse then this suggests a fault somewhere in the circuit! Has the fuse blown since being rewired and, more importantly, how did the fitter rewire it? Keith. No, no such problems since rewired back home in Devon, ,we were on 90 days Spain Portugal with the problems, , gave up used gas, the fitter here couldn't understand the way it was wired, told us would be ok, flashing lights again, he said problem is with the fridge, he wired from original wiring which has been checked by Thetford reg people Edited June 3 by rawhide Hope this helps Quote Link to comment Share on other sites More sharing options...
Keithl Posted June 3 Share Posted June 3 So your problem could still be with the lower current 12 volt supply for the fridges control panel. Do you have a voltmeter? If yes then measure the voltage at the smaller sized wires in your photo to check the supply. Then wait until the 18 minutes is up and re check. Quote Link to comment Share on other sites More sharing options...
onecal Posted June 3 Share Posted June 3 Hi You do say your Fridge works perfect outside your van , with two different independent supplies of both AC and DC Why not break it down and supply the fridge in your motorhome with 1. With an independent AC first (see if the 18 min fault reoccurs ) 2. Then with an independent battery D.C (see if the 18 min fault reoccurs) If it works as you say, all ok now 3. Take away the independent AC supply and re plug to the Motorhome AC supply 4. Take away the DC independent supply and re instate the Motorhome DC supply This should easily diagnose which circuit is your issue Re the timing , Has your engineer checked it's (the DC) is not wired into a timed circuit in your motorhome ? Regards 1 Quote Link to comment Share on other sites More sharing options...
Keithl Posted June 3 Share Posted June 3 @rawhide You have said a couple of times that the MH wiring has been checked by 'Thetford reg people' but yet the problem still persists so they are missing something obvious and now is the time for you to roll up your sleeves and find that problem yourself. We have suggested two or three very simple things to try and/or check yet so far you do not appear to have tried any of them so come on, roll up your sleeves and get your screwdriver and multimeter out! We are waiting with baited breath for your next update... Quote Link to comment Share on other sites More sharing options...
rawhide Posted June 3 Author Share Posted June 3 50 years building trade 40 years my own business, roll up my sleeves , the very simple things these people can't solve, at moment emails to Apuljack about Reich box, have fun keep smiling 1 Quote Link to comment Share on other sites More sharing options...
onecal Posted June 3 Share Posted June 3 Hi 😁 Share your answer sometime Regards Quote Link to comment Share on other sites More sharing options...
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