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Receiver drier service tip

By Paul DeGuisseppi, MACS manager of service training
Suspect you have a restricted (or partially restricted) receiver drier? You can find out by performing a simple test. Turn the A/C system on and allow a few minutes for it to stabilize.
Then, using an accurate contact thermometer, measure the temperatures of the drier’s inlet and outlet pipes as close to the drier as possible.
A difference of more than 10 degrees F between the readings indicates that the drier is internally restricted and needs to be replaced.


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When having your mobile A/C system professionally serviced, insist on proper repair procedures and quality replacement parts. Insist on recovery and recycling so that refrigerant can be reused and not released into the atmosphere.

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The 34th annual Mobile Air Conditioning Society (MACS) Worldwide Training Conference and Trade Show, Be the Best of the Best will take place January 16-18 2014 at the Sheraton New Orleans.

One response to “Receiver drier service tip”

  1. Does it work the same with an Accumulator & a Drier? I’m assuming so. As long as there is minimal restriction, inlet & outlet should be relatively the same temperature. Correct? The touch test now made more accurate!
    Walnut Auto Air
    Walnut, CA