A/C not blowing cold air

BUBBE11

MEMBER
2008 LINCOLN NAVIGATOR
5.4L
V8
2WD
AUTOMATIC
125,000 MILES

Just had radiator replaced. When I picked up navigator, A/C is not blowing cold air. Did not have problem prior to radiator replacement. Any thoughts?

Sunday, May 2nd, 2021 AT 11:17 AM

5 Replies

KASEKENNY

MECHANIC
18,907 POSTS

This could be a coincidence as you don't have to open the A/C system to do the radiator.

However, we need to start with checking the pressures and pull the system into a vacuum to see if there are leaks.

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

Let us know what the pressure is when the engine is off and then when it is running and A/C on max.

Once we know this info we will have a better idea what the issues could be. Thanks

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Sunday, May 2nd, 2021 AT 7:59 PM

BUBBE11

MEMBER
3 POSTS

Thanks for taking the time to reply. Our navigator has a tow package with a transmission cooler. The A/C system was purged, refilled and checked twice. Both readings (both high and low sides) were in spec. Mechanic mentioned we might need a new fan clutch. Just seems odd that A/C was perfect until new radiator was put in. Taking navigator back to mechanic tomorrow but hate to put in another $400.00+ for the fan clutch. Was hoping there was something minor that they may have missed when doing the radiator work.

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Sunday, May 2nd, 2021 AT 9:24 PM

KASEKENNY

MECHANIC
18,907 POSTS

I would press this a little bit and just ask what the pressures were when the compressor is on and off. Then with the engine off.

I agree that this a bit of a large coincidence so just knowing those pressures and that the system is working would make more sense that a faulty fan is causing this.

However, a fan would more likely cause overheating before it would cause A/C issues. This just sounds like it is low on Freon.

If it were me, I would rent a gauge set from the parts store and hook them up to see what they are.

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

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Monday, May 3rd, 2021 AT 8:46 PM

BUBBE11

MEMBER
3 POSTS

Just wanted to let you know the outcome. Mechanic went out and bought new gauges. Found out they were faulty. A/C only needed more freon. Everything working perfectly. Thank you for taking the time to reply.

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Thursday, May 6th, 2021 AT 11:03 AM

KASEKENNY

MECHANIC
18,907 POSTS

Thanks! It sounded like a Freon issue so that is great they found that as it is not the first thing you think of as you assume your tool is ok.

Thanks for the follow up and letting us know. Please let us know if you need other help in the future.