EB-air climate controller - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

DeathAdda · 05-30-2005, 14:23

I have a EB Fairmont with Electronic Climate control. My problem is the fan will not turn off! Or wind down its speed properly
I ended up pulling the wires from the fan supply.
I have disconnected the battery to reset the ecu
I have done the air con self test (off+floor buttons)
No luck, any idears?????

Aussiblue · 05-31-2005, 05:53

You need a new transistor in the fan speed controller. The TO-3 case sits in the air duct to keep it cool. Good idea except that moisture, leaves and crud accumulates in the duct and rusts out the case. The transistor in question is a Motorolla 2N5686 available at around $12 from World Wide Electonics at http://members.iinet.net.au/~worcom/
No other electronic component suppliers in Australia appears to stock it.
When you replace it buy and fit a T0-3 cover kit from Disk Smith, Altronics or Jaycar and also spray the outside of the case with electronic spray resin. Easy to replace if you can solder and desolder. Unscrew case from firewall (shiny cast alloy near glove box), take case apart, desolder transistor and solder in new one. Clean out the duct while fan speed controller is out.

Aussiblue · 05-31-2005, 06:15

See http://www.altronics.com.au/index.as...=item&id=H7290 or better http://www1.jaycar.com.au/productVie...Max=&SUBCATID= for the transistor cover. You will also need new insulation washers http://www.altronics.com.au/index.as...=item&id=H7200 or http://www1.jaycar.com.au/productVie...Max=&SUBCATID= and some Unick or similar thermal grease http://www1.jaycar.com.au/productVie...Max=&SUBCATID=(as used with your TFI module)

xcgxl · 05-31-2005, 13:50

Interesting! I wonder how many people have been charged HUNDREDS of dollars to have the whole thing replaced at a Ford dealer.

DeathAdda · 05-31-2005, 15:09

Thanks very much AUSSIBLUE!!!
I NOW HAVE A WEEKEND PROJECT...CHEERS

Aussiblue · 06-01-2005, 05:53

Quote:

Interesting! I wonder how many people have been charged HUNDREDS of dollars to have the whole thing replaced at a Ford dealer.

Actually when I first had this fault many years ago in my NB Fairlane Ford could not supply replacement fan speed controllers and I couldn't get replacement transistors. I actually got it working by temporarily repairing the T0-3 case (remove rust, solder hole cover with spray resin etc). It failed terminally again soon after by which time World Wide Electronics, in response to my request, had secured a supply of the transistor. Ford still had no stocks and I let my local Ford parts man know the solution but I got the impression that it all sounded too hard for them to consider doing for their customers (and admittedly the labour costs of doing this repair would add up to a bit).