My heaters stopped working .. lovely in such warm weather!

Just been down a scrappy tried a different motor and resistor, still no luck.

Could the switches on the center console have a play in the dead heating?

They could, but it's more likely to be the earth side that's faulty. My P100's heater fan has just packed up, too. Bloody Fords.

you need to do some lectrickery testing down where the resister is a multimeter or even a bulb on a stick (ok wires) would do

Should the fan work once removed from its slot?

When i got a different fan from a scrappy i just plugged it in and tested it without screwing it in..

It should work like that shouldnt it?

With 12v + and - applied to the motor, yes.

SouLz said:

My heaters stopped working .. lovely in such warm weather!

Just been down a scrappy tried a different motor and resistor, still no luck.

Could the switches on the center console have a play in the dead heating?

Click to expand...

Am i right in assuming you've checked the fuses?

UPDATE:

Got a new fan motor.

Tried both fan motors on a 9V battery and both spin and work so it wasnt the motor in the first place.

Replaced center dial for speed out of another punto to eliminate if the switch had shorted. Still not working.

I tried a resistor from another car (In scrappy) that didnt work so i am stumped unless that resistor was nackered also.

Tried putting an LED sidelight bulb with 2 wires connected to the fan power cable - Bulb lights up when fan speed set above 0

When set to 0 bulb goes out - Not sure if i should be using a LED tho due to there low power requirement.

Any ideas guys because im stumped.. Resulted into buying a £20 ****ty cig lighter fan which i can breathe faster than it blows out heated air but it'll have to do while im at work.

Alec

Do the sidelights come on when you turn the heaters on?????

CONN4H said:

Do the sidelights come on when you turn the heaters on?????

Click to expand...

Nope - also checked that ealier, Turned engine on - Turned fans on and sidelights stay off. Turn sidelights on and they work fine.

Im having same problem with mine at the minute, i had this problem 6-7 months ago, and it was a wire underneath the glovebox you could maybe give that a try??

https://www.fiatforum.com/punto-guides/170894-mk2-my-sidelights-come-instead-my-interior-fan.html



WORTH A TRY! GOOD LUCK.....

Thanks for the link!

Will give that a try tomorrow as gotta go work in the snow now.

Lets hope my £20 heater keeps the window clear!

Check + and - on the supply side. If it isn't the motor (and resistor packs usually fail on one or two speeds) it has to be the supply. As I remarked in post #2..................

fingers99 said:

Check + and - on the supply side. If it isn't the motor (and resistor packs usually fail on one or two speeds) it has to be the supply. As I remarked in post #2..................

Click to expand...

When you say the suppy side..

Do you mean the connector that connects to the motor or something completely different?

Well, the connector that connects to the lead to the fan motor. If not 12v there, that's the issue.

fingers99 said:

Well, the connector that connects to the lead to the fan motor. If not 12v there, that's the issue.

Click to expand...

Will check the connector tomorrow - hopefully it will be that

Check with a multimeter. If it's OK on the + side but not on the -ive, consider running another earth.

Hi guys,

Couldnt get hold of a multimeter today but did some tests..

Tried running an alternate ground cable into the connector block ( - ) and plugged fan in.. Still no luck

Could it possibly be the the positive thats burnt out? If so where does it get its power from.

i appreciate the need to get this working but you will find it impossible to fault find without at least some kind of voltage indicator. S and B pointed out sticking a bulb on a wire earlier in this thread why have you not tried that?

You need to find where the electrickery stops, i,e power at the fuse, power at the switches power at the fan it's self, these will be the areas where you are likely to find burnt wiring.
Earths very rarely burn out and if they do there is usually not a lot left of the positive side of the circuit, usually you would be testing for just a poor earth, leave your temporary one in place until you can get your fan working, then switch back to the original

AndyRKett said:

i appreciate the need to get this working but you will find it impossible to fault find without at least some kind of voltage indicator. S and B pointed out sticking a bulb on a wire earlier in this thread why have you not tried that?

You need to find where the electrickery stops, i,e power at the fuse, power at the switches power at the fan it's self, these will be the areas where you are likely to find burnt wiring.
Earths very rarely burn out and if they do there is usually not a lot left of the positive side of the circuit, usually you would be testing for just a poor earth, leave your temporary one in place until you can get your fan working, then switch back to the original

Click to expand...

I have tried the bulb and wire into the connector and the bulb doesnt light up. - I have tried it with a LED sidelight and the bulb lights up very dimm so it seems like there just isnt sufficient power to the connector,

I have replaced the actual heater control switch with another one i got.
I know both the fans i have atm are fully working and i have ran an additional ground to rule out a bad earth so it must be a power supply issue.

Unsure where to go next,,