My 1998 dodge ram 1500 4x2 with a 5.2 engine is experienceing an air conditioning problem. .It will stop sending cold air when I go over a bump in the road. When I hit a bump again it will cut back on. Some times it will run all day and sometimes only a few minutes. The air is ice cold. The fan still blows air at all speeds but it is warm. Any help. Thank you.This has been going on for 4 days and started after I drove a few miles on a(bad) dirt road. Please help. Thanks.

 

Check the blend door inside the cab and ac lines under the hood.