Climate control

[TE50 027]

The climate control in my TE50 seems to have died. I have no fan control, and even when the car is turned off with keys out, the fans continue to run. I'm guessing a solenoid has given up the ghost and to prevent my battery from going flat I have removed the fuse 40amp fuse for it, but a local Ford dealer refuses to assist me unless I book it in for an inpspection for $90.
Seeing as the T1 was Fairmont based the climate control for both is exactly the same so I was hoping someone may have had a similar problem in the past and can give me an idea of what needs to be replaced and at what sort of cost. Hoping it's not the entire climate control cluster as I'm assuming they're not too cheap. Thanks guys.