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Ac issue

674 Views 5 Replies 4 Participants Last post by  Cusser
I have a Nissan Frontier 2018 , 80,000 miles. I had the expansion valve changed because it going hot to cold . Since I pick my truck up the ac stopped cooling when sitting still. We had the ac level checked it's in the green. When I go 55 it's cold. It also seems something is kicking on and off constantly. 馃槬
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Have it rechecked, could still be low on Freon or your compressor is failing.


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We had the ac level checked it's in the green.
This is not real information. The "green" is likely from one of those "Miracle in a can" products that only have a low pressure gauge, and most times contain sealer chemicals of some type (sealer chemicals are BAD !!!!). The only real way to tell whether refrigerant level is OK is for a shop with an expensive recovery machine to pull out all the refrigerant and weigh it, and then compare that to specification. Big issue is that most shops will not work on systems containing sealers, as there's a detector in the machine so their machine won't get contaminated/ruined.

Since I pick my truck up the ac stopped cooling when sitting still. When I go 55 it's cold. It also seems something is kicking on and off constantly. 馃槬
Assuming that there's no sealer chemicals in the system, and that the refrigerant is at the correct level, this sounds like a typical air flow issue over the condenser (in front of the radiator). So sounds like a fan clutch issue (or electric fan issue, if your truck has that).

I had the expansion valve changed because it going hot to cold .
I think the shop that replaced the expansion valve should be contacted, could be related to something they did.
make sure your coolant level is correct. I had a leaky coolant reservoir and I had not great AC at low speeds. since my leak started small I didn't connect the two until I replaced the reservoir and fully purged the cooling system of air.
Could the ac pressure sensor cause this too? I'm having everything checked Thursday.
Could the ac pressure sensor cause this too? I'm having everything checked Thursday.
Good. Let the pro check.
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