Buick Regal Problem Report

Buick Regal HVAC Display May Become Dim or Go Out Completely

(22 reports)

The display on the heater and AC control panel may become dim or go completely blank. Our technicians tell us the control panel must be replaced to correct this fault.

Illumination of the odometer, heater display and driver info unit are all controlled by a series of 0.5 ohm resistors on the printed circuit board of the affected unit. With some effort and skill you can take the dash apart pretty easily and replace them with resistors available at Radio Shack. I had this happen and for $3 worth of resistors and a couple of hours time I had everything working 100% again. You can find short video's on You Tube on how to do this repair. -
I have a problem with my HVAC control being very dim and hard to read, especially in the day light and even at night. -
Electronics are failing starting at 125000, the heater display went out, Then at 175000 the driver information panel went out, now at 219000 the odometer has gone out -
The heated seat and temp control display work intermittently. -
I never had it fixed. It is still dim to this day so I operate blindly by counting the clicks. Unit still works fine. Also, it will randomly light up fully but very rarely. I don;t know what triggers this. -
HVAC Temp. display not working. Odometer & gear shift position display not working. Just purchased the car a couple of days ago and the Odometer/Gear Shift display was working when I test drove the car, but was VERY dim, but now has cone completely out. The HVAC temp. display was not working when I bought it. Have not tried any repair yet. Just now searching the net for suggestions. Bob -
dash display panel dim or just go out often. -
HVAC and dash display failed. Went on Youtube and watched videos on diagnosing and repairing lost display of dash lights, ability to dim dash lights, and no display on climate control and odometer. Replaced dimmer switch that can be found behind knob that turns on head light. Think dimmer controller switch was $60 from auto parts store (Auto Zone, Pepboys,etc). Occasionally the odometer display is still not visible, and to fix this you have to remove dash, and also gauge cluster. Four specific resistors on back of gauge cluster need to be replaced and new ones soldered in. Can be accomplished for under $15 (cheap soldering gun and $3 for resistors at RadioShack). I had never really soldered before and ended up frying the circuit board on the AC unit. GM wanted $467 (roughly), and i found a used one on Ebay for $50. I should have watched several more tutorials on soldering, but I had an abundance of false confidence that i had to pay for. Some many DIY and How To videos on YouTube one can really learn just about anything they wanted t. Save a bunch of money, and learn something new by using all the resources available online. -
hvac&odometerlights too dim to see not repaired yet -
radio heater clock clicks off or dims.. -
Same display issue..... sure miss my boost display! -
HVAC display dim or not visible. Display will come back briefly (few seconds then fades) if front face is tapped. -
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