My AC rad/compressor/lines are long gone and I currently have my interior out for a major weight reduction overhaul.

Can I simply yank the cooling unit? I still need heat - and it seems like the blower and heater unit require each other and the AC cooling unit connects them? Anyone done this or know how it all works? Thanks in advance.

(Not interested in a debate over weight reduction or keeping AC)

 

You could pull the evaporator box and and just remove the coil from it. Theres just a few screws holding the box together. And i would definitely plug the holes with something so you dont get water/exhaust fumes coming in the car.

 

^by evaporator box you mean what the FSM calls the 'cooling unit'?

So if I pull that box and plug the hole in the firewall, the openings on the 'heater unit' and 'intake/blower unit' won't affect the system's blowing capacity when the heat is on?

 

You have to pull the evaporator coils out of the cooling unit and reinstall the box, empty. It's the only way to connect the blower to the HVAC system.

 

Ahh that's making more sense now. So we can only really pull out the innards of the cooling unit to save weight - the box is still required for ducting.

thanks for the answers guys...i'll report back shortly with the weight savings figures...if any haha.

 

Thats it.

Yeah the coil itself only weighs maybe 2-3 pounds. But yes, the cooling unit box is part of the vent ducting.

 

5.2 lbs for the coil and the little coil sensor from my measurements - very very happy with that! The duct-box that goes back in weights about 1.2 lbs - which isn't too bad.

Overall dropping the complete AC system is a major shedding IMO.

What is that sensor on the box? (it's a 3 prong sensor that has 4 cooling ribs that protrude into the box - and the sensor itself has a circuit board on it) The fsm doesnt even show it as far as i can tell - not sure if it's for AC only or is a thermostat that effects the heat too. I removed it from it's casing - and reinstalled the casing after blocking the holes with foil duct tape. Not sure if I'll need it or not.

 

Could be the blower motor resistor.

 

I agree with asand1, that is the blower motor resistor. You will need it, as the blower motor won't work without it.

 

^ Thanks - you guys were right. Found it in the FSM titled the 'fan control amplifier' which as you both said - controls resistance for the blower motor speed. Guess thats going back in - little bugger is heavy