Heater Stopped Working

[Sir Nancy Flowers]

Hello All,

I know this topic has probably been covered 1000 times but I figured I would post my results.

My heater fans were on the blink when I collected the car in February. They would intermittently work and then suddenly die, always when starting the car up from cold. The lights on the Climate Control Unit still work and I know the heating still works as when cruising on the motorway, I get a draft of warm air (not engine warmth).
A few months back, it finally died.

I immediately jumped at Heater Resistor Pack. This seems to be very common on most models of cars, no matter the make. EurocarParts £40, done.......Still no hot.

Now I am thinking its the heater motor itself. This, based on some research, seems to be more likely. Has anyone had this issue?

I will remove the heater motor and inspect it when I get some time.........

 

[letsturboit]

Secondhand blower would probably fix it. I did same in my phase one, jumped at resistor pack and turned put to be blower motor. There's a few diff blower motor versions so be sure which you need.

 

[cs_dave]

Test the resister to confirm bridge the 1st and 4th on the resister conector if it dont blow at full pelt the blower it self is duff

 

[guysy]

Lost the fans on my car yesterday, never had a problem with them before, just doing a bit of research I see this is the latest thread, will do the test for the bridge tomorrow and see what I get.

Also seeing the "cheap" resistor packs off ebay are not recommended? what about a repair place? I recently had my UCH repaired which touch wood seems ok. any recommendations for a safe resistor pack at a reasonable price? or a repair place?

Thanks.

 

[imprezaworks]

How much are they from Renault?

 

[guysy]

Im not sure on current price but older threads are saying around the £100 mark.

Searching on amazon as prime will be the fastest option around xmas.. this one made by Febi should be alright? https://www.amazon.co.uk/dp/B00CDJX4HW/?tag=cliospnet01-21

 

[imprezaworks]

Ah okay. Unless someone knows of a reputable part I'd be sceptical about buying cheap.

 

[cs_dave]

I wouldnt buy the cheap ebay ones tbh. Febi should be ok but still gen is always best

 

[imprezaworks]

@bloke ref febi part

 

[Sir Nancy Flowers]

@cs_dave how do you go about testing it? Cant say electics are my strong point. Im also assuming ill need a multimeter too??? Being crimbo I probably wont get around to testing stuff myself!

 

[Sir Nancy Flowers]

@guysy I have a brand new resistor pack from euro car parts. Forget the brand. I tried it in my clio and it still didnt work so that might be going spare if you are up for that!

 

[cs_dave]

@cs_dave how do you go about testing it? Cant say electics are my strong point. Im also assuming ill need a multimeter too??? Being crimbo I probably wont get around to testing stuff myself!

On the plug on the resister theres 4 wires going to it bridge 1 and 4 and if the blowers stay on full power you wont be able to turn them down its the resister at fault

 

[Sir Nancy Flowers]

@cs_dave thank you! I will see if I get round to it tomorrow

 

[guysy]

Well Boxing Day decided to bring me a flat tyre as well !

Just bridged mine, my terminals where 1 and 5, and I got full fans.

Will order the febi part now to keep me going, I'm seeing you can order the transistors (if that's the correct term) on eBay for a fiver from France - so I might see if I can get my old one going as a backup.

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[guysy]

Now the next thing is I've realised the febi part might only be for a 1.2? or are the heating systems the same?

 

[guysy]

Also this looks like the part that is most likely blown on my old pack after a bit of research, might order one up to see If it fixes the old one, I guess the repair services on ebay most likely just solder one of these on

http://cpc.farnell.com/fairchild-semiconductor/huf75339p3/mosfet-n-to-220/dp/SC12748



I can see now why the febi part wont fit (turned my brain on) my connector is like this

https://www.amazon.co.uk/dp/B01EFG00TU/?tag=cliospnet01-21

 

[guysy]

Right so the mosfet part came before the replacement heater pack.

Decided to see how easy it would be and if the fix would work.

The new chip was much smaller than the original including the legs. My soldering iron was s**t as well. But eventually I had the chip soldered on- used some thermal paste against the heat sink.

I now have fans - but even with the panel off, the fans go up and down but just not off, possible there is something wrong with the rest of the board, Any suggestions ?

Either way it's nice to have some fans now, I will see if the new pack cures everything or not.

I did clean the pads up before putting the new chip on.

Sat in place nicely on the heatsink with the clip...

(I broke the old legs off the transistor I know it's a massive bodge but I wasn't going to get all 3 out with my pissy iron, I removed them one by one)


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[Sir Nancy Flowers]

I finally got round to fixing mine the other day! HOUSTON, WE HAVE FANS!

Turns out mine was the heater motor itself. Hence the slow death of the fans before. Second hand heater from eBay and all sorted!