I own a 93 buick regal custom. i live in canada where the temperature hits just below freezing, anyhow i hadn't used my car in about 3 days, came to try to open it, lock was frozen, so we put lock de-icer and since i went on vacation my grandfather continued to put lock de-icer and try to open the door. we managed to get the door open about a week later. but we had to use a slim jim, because the key wouldnt help, still to this day, the only way to get into the car is i have to leave the window open while the car is in my garage and try to unlock my door from the inside, but it works sometimes, i have power locks, but i do not have a remote fob to unlock, its only in the door, what is the problem? The back doors are not a problem, when we unlocked all the doors, they open.

It sounds like the linkage is now broken or the latch inside the door is not working or is disconnected. I live here in Alaska and I have seen and worked on this same problem many,many times. -- one thing you can do is remove the inside door panel to expose the linkage rods and make sure that one of them did not get unhooked while you were trying to slim jim the door. if a linkage is disconnected then just reconnect it ( as long as the clip is not broken -- you can get new clips at either the dealer or a automotive locksmith shop. but when you do get to the inside of the door what you will see is -- one rod going from the lock to the latch,, one rod going from the latch to the lock/unlock button,, there will be a rod going from the outside door handle down to the latch and there is also a rod going from the inside door handle to the latch. the one you want to look at is the one from the lock to the latch -- if it is loose, then it is disconnected, re-connect and you should be good to go. also to help keep this from happening again, spray lubrication into ALL your locks and cycle key in and out a few times and re-spray ( use ONLY Teflon based lube -- like Tri-flow* or LPS,, NO WD-40 !!! ) this will help keep all the moisture out of the pins and waffers in the lock itself, also while doing the panel removal and latch fixing keep the car in the warm garage to help dry out any moisture that may still be in the door and locks. I hope this helps -- when you start to pull things apart feel free to drop me a line if you have any questions (( [email protected] )) ,, I have been a locksmith for 18 years and I have torn down many door panels and I can walk you through the whole thing.. BUT if you do not want to get your hands dirty -- just make an appointment at your local automotive locksmith shop and for $20 -$35 dollars they will do all this in about 30 to 45 minutes,, plus they willl lube everything up for you and you will have hassle free locks for a long time. hope all works out well --- and Happy NewYear !!

c...