Air Condition Checks

Auto Repair

Air Conditioner Checks

In front of the radiator on air conditioned vehicles there is a part that resembles a radiator. This is the A/C condenser. Air flowing thru these fins is what dissipates the heat from the Freon in your A/C system. One of the simplest things to check is that the fins are not blocked with dirt, bugs or bent over preventing air from flowing thru them. A gentle brushing, as the fins bend easily, and air blown from the exhaust of most vacuum cleaners or an air compressor will do a great job of cleaning the condenser. This check and cleaning should be done at least once a year to insure maximum A/C cooling.

Now check the belt that drives the A/C compressor. Checks here are to make certain the belt is not missing, cracked, glazed or loose. A missing belt could mean a part driven by the belt seized and will need to be replaced. Check the inside of the belt for cracks. A belt that has cracks will eventually break and could also be the reason why the belt was missing as previously stated. A belt that is glazed or somewhat hard and shinny are indications of a belt that has been slipping. All three of these conditions will require a new belt. Belt looseness can be checked by applying a little pressure to the belt. There should be about ¼ inch give on a properly adjusted belt. If more then ¼ inch looseness is found, the belt tension will have to be adjusted on vehicles with manual adjustments. If equipped with a belt tensioner, the tensioner will require replacing to correct a loose belt condition.

With the engine running turn the A/C system on and watch the compressor to see if it cycles on and off and the electric fan, in front of the radiator on vehicles so equipped, runs whenever the A/C compressor is running. This is how a normal A/C system is to work.

Last check is to look closely at all the visible A/C hoses, parts and connections. Any visible oil residue on any A/C hose or part is a sign of a Freon leak.

If all your checks are satisfactory, its time to see if you’re A/C system is working properly. You will need a small thermometer that can be inserted into the center duct of the A/C vent. With the thermometer in place, put the A/C settings on maximum and the blower speed on it highest settings and take your vehicle for a drive. If all is well, the air temp from the center duct should go to 50 degrees or under after driving a mile or two. Note# on extremely hot and humid days, you may have to drive a further, but the temp should be in the low 50 degree range.

Auto Repair