John Deere 6620 Heater Fans not working

[Fuzzy]

The cab fans have stopped working in the 6620. Is it the resistor or the switch at fault ?
Any help appreciated

 

[milkloss]

Not something I’ve really been involved with (we obviously have a couple of very helpful members that are very knowledgeable!) but have the fans motors been swimming in water?

 

[Timbo]

If you have no fans at all, then check the fuse intially. If you have flat out speed but nothing else, change the resistor.

Also to bear in mind is that if you were running on one fan unknowingly for a time, the 2nd one will have a surely died.

I always change both fans if I am in the HVAC for any reason, also check the heater valve for leaking and not shutting off fully. Any doubt i change that too whilst the seat is out, and flush out the evap core which will inevitably be full of dust and sped up the fans dying.

 

[Fuzzy]

If you have no fans at all, then check the fuse intially. If you have flat out speed but nothing else, change the resistor.

Also to bear in mind is that if you were running on one fan unknowingly for a time, the 2nd one will have a surely died.

I always change both fans if I am in the HVAC for any reason, also check the heater valve for leaking and not shutting off fully. Any doubt i change that too whilst the seat is out, and flush out the evap core which will inevitably be full of dust and sped up the fans dying.

Thank you, Yes that all makes sense, checked fuse, swapped relay, and i couldn't remember how to check resistor..... nothing on flat out, so i am going to order 2 fans, the fan did seam a bit sluggish so maybe only one working when i bought tractor. Thanks.