Air conditioner

Asked by Apr 30, 2016 at 04:50 PM about the 2008 Dodge Ram 1500 Quad Cab Big Horn Edition 4WD

Question type: Maintenance & Repair

When I turn on the air, there is a loud thump under the dash.

2 Answers

650

The thumping noise under the dash is caused by the blower motor probably hitting the basket that goes around it. The basket may have debree in it an the fan is hitting it making that thumping sound. An the blower motor itself may be going bad. It should be located underneath the glove box check it out an let us know! Good Luck.

102,145

You could also be hearing the expansion valve pop just as the pressures rise to operational range, look at where the valve is mounted and see if it is too close to the firewall without any rubber buffer material between the valve and the wall. Do you know if there has been any heater or A/C work done?

Your Answer

Dodge Ram 1500 Experts

  • #1
    Dan Connell
    Reputation
    6,480
  • #2
    pudgybear
    Reputation
    6,290
  • #3
    dandyoun
    Reputation
    5,700
View All

Related Models For Sale

Used Ford F-150
2,576 Great Deals out of 197,078 listings starting at $1,300
Used Chevrolet Silverado 1500
2,269 Great Deals out of 169,081 listings starting at $1,000
Used Dodge Ram 2500
172 Great Deals out of 5,043 listings starting at $2,200
Used GMC Sierra 1500
1,028 Great Deals out of 66,259 listings starting at $1,995
Used Toyota Tundra
467 Great Deals out of 33,601 listings starting at $2,000
Used Toyota Tacoma
598 Great Deals out of 44,634 listings starting at $1,790
Used Ford F-250 Super Duty
328 Great Deals out of 45,597 listings starting at $1,700
Used Dodge Charger
430 Great Deals out of 28,428 listings starting at $2,490
Used Dodge Dakota
95 Great Deals out of 3,654 listings starting at $1,750
Used Nissan Titan
215 Great Deals out of 20,682 listings starting at $3,390
Used Dodge Challenger
253 Great Deals out of 22,373 listings starting at $7,488
Used Chevrolet Colorado
275 Great Deals out of 34,283 listings starting at $1,900
Used Ford Mustang
611 Great Deals out of 36,332 listings starting at $899
Used Dodge Ram 3500
77 Great Deals out of 2,201 listings starting at $5,750

Used Cars For Sale

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.