Buick Repair Questions? Ask a Mechanic for Answers ASAP
does your 2000 have automatic climate control or manual climate control
And does it have separate driver and passenger side temperature controls
Ok, I have attached a diagram with it highlighted.
Looking underneath and behind the driver side of the dash towards center of dash, you will see the end of the hvac housing box. There will be 2 actuators. You want the one slightly lower and toward firewall of the 2
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you are welcome and have a great evening
Ok, can you get me the 17 digit vin number and let me pull it that way
Ok, by the vin number, it only has one temperature blend door actuator. On the passenger side - should be yellow, dark blue and brown wires at it.
Correct, one actuator for both sides.
Remove the actuator and operate the door shaft that the actuator goes onto and see if it moves freely from hot to cold and cold to hot. If it does, then it is the actuator. If not, then something inside the housing is causing it to stick or the door is cracked or broken
I dont have the part numbers but there is a difference between the one with passenger and driver side actuators and one with just the single temp actuator. They likely gave you the one with the 2 actuators
ok, will be here all day
Ok, do you have ac gages to check the ac pressures on high and low side? Sometimes a slightly low refrigerant level will cause this condition. The evaporator is on the passenger side, so if refrigerant level is low, the passenger side gets the coldest air since its vents are closer to the evaporator.
I like to rule this out before plunging into possible obstruction in vent ducts or debris on evaporator.
Ok, I want to try a recalibration. the actuator needs to be in place and plugged in for this
In the fusebox underneath the rear seat, remove fuses 33 and 37 for at least 1 minute. Reinsert and turn key to on position for 1 minute. Crank engine, wait 1 minute and then test the temperature control
Ok, refrigerant is good.
with no difference with recalibration, I suspect that either there is debris on the evaporator or something blocking full actuation of the door
Yes, with it missing, that allows pine straw, leaves, or other debris thru the fresh air into the evap housing. you could try sticking a flat wand attachment to a shop vac and suck it out and see what you get
This does not sound like an actuator issue though. It sounds like a leak in the system. I detest the stop leak. It gums up the orifice tube/expansion valve as well as the evaporator and condenser. I wont even touch a vehicle with it in the system as it damages ac recovery machines.
the actuators are a different design in the 2003.
Get refrigerant with flourescent dye in it and shoot into system and run with ac on for a few days, then use a black light to inspect the ac components for traces of the dye. For the evaporator, you usually are able to see some in the ac condensation that drips onto the ground.
sorry, my bad. I was on the wrong schematics.
the 2003 is identical to the 2000 for the actuators
sounds good, and keep me posted.