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780 automatic heater controls to regular, is it hard? - Printable Version

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780 automatic heater controls to regular, is it hard? - 122power - 09-10-2012 12:09 PM

Have a 87' 780 that has the automatic heater controls but would rather have the regular three knob set up. Is it hard to change this or would I have to rip the whole dash apart to switch over? Can I just change the controls or is the rest totally different?


RE: 780 automatic heater controls to regular, is it hard? - blu92in99 - 09-10-2012 06:12 PM

Helped a friend do this conversion on his '86 764T. Went from the single dial-a-temp automagic temp system to the normal 740 HVAC controls. It required changing the entire HVAC box under the dash; there were too many little differences with diaphragms, linkages, duct routing, etc. We hoped for a control head swap and go, but it was way more involved.

Not trying to scare you off, it's a very worthwhile conversion. Just saying from experience to grab everything you can think of from a donor car first. At the very least grab the complete HVAC box, control head, and everything that goes between the control head and said box.


RE: 780 automatic heater controls to regular, is it hard? - miguel.760ti - 09-10-2012 06:20 PM

^ That

All 780s should have the 3 knob auto setup like this though, which is basically what you're asking for? Or do you want to get rid of the auto capabilities?

[Image: image.axd?picture=2009%2F8%2F780-Image3.jpg]


RE: 780 automatic heater controls to regular, is it hard? - 122power - 09-12-2012 05:49 PM

Yes want to get rid of the auto controls if I keep the car but most likely will sell it. It works but A/C not woking. It has the prv in it too.


RE: 780 automatic heater controls to regular, is it hard? - miguel.760ti - 09-12-2012 07:14 PM

If it works why dick with it? A/C work is easier than college girls with the right equipment