Why does it make a poping noise wen the ac is off


Asked by May 27, 2013 at 09:57 AM about the 1996 Lincoln Town Car Signature

Question type: Maintenance & Repair

every time i turn on my car it starts to make a poping noise close to the ac compressor
and wen i turn the ac on cold the poping noise stops and if the ac is on hot it starts to pop

1 Answer

Tracy Hooks

The only things I know of in that general vicinity that can make noise like that are the belt, the compressor clutch and the over-pressure pop-off valve. You can watch the compressor in operation to see if it's the clutch engaging and disengaging or if a "fog" comes up from the compressor when the noise occurs. Is the electric fan coming on when the AC is on? There's an electric fan in front of the big belt driven fan. If the system is over pressurizing and popping off, your AC performance will drop off too. Excessive clearance in the AC clutch (more than 0.030") will be a little noisy. Look at your belt tensioner to see if it's at it's limit. Serpentine belts can stretch and cause the tensioner to be noisy too.

Your Answer

Add photo

Related Questions

Search Lincoln Town Car Questions

Lincoln Town Car Experts

#1 FordNut
Reputation 1,530
#2 Tracy Hooks
Tracy Hooks
Reputation 1,320
#3 Tom Demyan
Tom Demyan
Reputation 1,280
View All

Related Models For Sale

Used Mercury Grand Marquis"
50 Great Deals out of 2,571 listings starting at $1,300
Used Lincoln Continental"
1,944 listings starting at $42,556
Used Ford Crown Victoria"
10 Great Deals out of 1,649 listings starting at $1,950
Used Cadillac DeVille"
2,401 listings starting at $1,600
Used Ford F-150"
3,253 Great Deals out of 217,198 listings starting at $1,000
Used Chevrolet Impala"
939 Great Deals out of 35,889 listings starting at $700
Used Mercedes-Benz S-Class"
187 Great Deals out of 6,677 listings starting at $2,900

Used Cars For Sale

2007 Lincoln Town Car Signature For Sale
5 Great Deals out of 80 listings starting at $2,700