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Car Forum / Peugeot Cars / December 2006406 Rad cooling fans dead.
The radiator cooling fans have stopped working on my 97 406 petrol. I've checked fuses and every connection I can find, but all ok. Any suggestions? I fed up of cooking myself with the heater on full blast whilst stuck in traffic! Thanks Chris > The radiator cooling fans have stopped working on my 97 406 petrol. I've > checked fuses and every connection I can find, but all ok. Any > suggestions? I fed up of cooking myself with the heater on full blast > whilst stuck in traffic! Firstly is 12V reaching the fans? If so is the ground connection ok. Can you measure resistance across the motor. I don't know what the wattage of the motors are but you should see a lowish resistance but not a dead short obviously. Do the fans run if you put 12 V on them from a separate feed?  SignatureMalc "AFB Mr Tracey." "Underbirths are og" Les Barker - Irrational Neutscene > > The radiator cooling fans have stopped working on my 97 406 petrol. I've > > checked fuses and every connection I can find, but all ok. Any [quoted text clipped - 5 lines] > motors are but you should see a lowish resistance but not a dead short > obviously. Do the fans run if you put 12 V on them from a separate feed? Not sure about the earlier models, but the facelift models ('99 on) have a box in front of the radiator containing several relays which control the fan; the box catches a lot of water and it can get inside the box and corrode the relays. You need to take off the front grill to access it. Martin Signaturemartin<dot here>whybrow<at here>ntlworld<dot here>com > Not sure about the earlier models, but the facelift models ('99 on) > have a box in front of the radiator containing several relays which > control the fan; the box catches a lot of water and it can get inside > the box and corrode the relays. You need to take off the front grill > to access it. That's worth knowing thanks SignatureMalc "AFB Mr Tracey." "Underbirths are og" Les Barker - Irrational Neutscene Thanks to everyone for your suggestions. I've tried everything I can, but failed. There is no 12 volts reaching the fans. With a battery connected directly to them they run ok. I can't find a thermostatic switch despite looking, although as you say there must be one somewhere. A mechanic who has seen a similar problem told me he had to have the ECU replaced - not an option I'd consider on a car this old. Think I'll hard wire the fans to a BIG switch on the dash! Cheers Chris > The radiator cooling fans have stopped working on my 97 406 petrol. I've > checked fuses and every connection I can find, but all ok. Any > suggestions? I fed up of cooking myself with the heater on full blast > whilst stuck in traffic! Have you checked the thermostatic switch? I don't know specifically about the 406, but it's usually screwed into the side of the radiator. Withdraw the connector from the switch and bridge the contacts. Do the fans now work? Peter Chris I have a 1998 406 1.9TD with air con and had the same problem. This uses a bitrol system to control the 2 fans. The system is switched on by the brown thermostat of the three on the engine. This then switches a changeover relay and 2 other relays to either give slow speed both fans in series or fast both fans in parallel. Is this similar to your system, if so I can give you the information to fault it. Mike > The radiator cooling fans have stopped working on my 97 406 petrol. I've > checked fuses and every connection I can find, but all ok. Any suggestions? [quoted text clipped - 3 lines] > Thanks > Chris >Chris >I have a 1998 406 1.9TD with air con and had the same problem. This [quoted text clipped - 9 lines] >you the information to fault it. >Mike Mike, this is exactly what I am experiencing with my 1998 406 2.0. Cn you provide me with the information I will require to fault it please. Q-Ball SignaturePosted at author's request, using http://www.AutoBoardz.com interface Articles individually verified to usenet standards. Visit URL to contact author/report abuse Thread archive: http://www.AutoBoardz.com/406-Rad-cooling-fans-dead-Peugeot-ftopict197912.html > The radiator cooling fans have stopped working on my 97 406 petrol. I've > checked fuses and every connection I can find, but all ok. Any suggestions? [quoted text clipped - 3 lines] > Thanks > Chris You have had a better response from the group than I did. If you look at my recent post: 406SV - expensive 120k service you will see I was puzzled why they replaced both fan motors (and, according to the invoice, did not replace and sensors or relays). Both motors seem to work OK. The vehicle had done 120k and I was not overly concerned provided they fixed the problem. And they did. There has been no sign of overheating since. It may be that these motors, when aged, bind up during operation - that is the only possibility I can think of for the fix having worked (unless they replaced sensors/relays and forgot to charge - not likely!) Chris As both fan motors work either in series for slow speed or parallel for fast speed. I assume their logic is replace both as if one has gone the other will go shortly after as it is always operating when the other one is. Having replaced one I understand this logic, as with my vehicle you need to remove the radiator , intercooler and air con radiator to get at the fan bolts. Michael > > The radiator cooling fans have stopped working on my 97 406 petrol. I've > > checked fuses and every connection I can find, but all ok. Any suggestions? [quoted text clipped - 15 lines] > is the only possibility I can think of for the fix having worked > (unless they replaced sensors/relays and forgot to charge - not likely!) |
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