NX AC not cooling well

MinnesotaEric · Jun 1, 2022

Tigershark said:
Don't think there is but there is something called a thermocon might be the same thing that prevent the evaporator from freezing maybe it's messed up or a bad expansion valve

Right: the thermocon prevents the AC compressor from spinning when the AC environment is too cold (it can and will warm up enough in the winter to work as a defrost). So to visually confirm function, you look at the compressor clutch and confirm that it is locked and spinning the compressor.

Tigershark · Jun 2, 2022

Still haven’t figured out anything but did order the radiator genie that Eric recommended and man that thing is awesome. Rinsed the radiator and the fins off they were dirty Compared to my regular hose and leaf blower so they are very clean now unfortunately the AC still isn’t real cold but do appreciate the advice and it will be handy to have after combining the wheat to clean off the combine. starting to look like I’m going to have to take it an hour away to the dealer

MinnesotaEric · Jun 3, 2022

Tigershark said:
Still haven’t figured out anything but did order the radiator genie that Eric recommended and man that thing is awesome. Rinsed the radiator and the fins off they were dirty Compared to my regular hose and leaf blower so they are very clean now unfortunately the AC still isn’t real cold but do appreciate the advice and it will be handy to have after combining the wheat to clean off the combine. starting to look like I’m going to have to take it an hour away to the dealer

I think you should pop the six 12mm nuts and the red tab that hold the top of the tractor cab off and inspect for a pile of garbage up there. Trust me on its own the NX cab can suck junk in and with a mouse Highway, it can get much worse. PM me and I’ll share my number and can walk you through the process. Get a helper for handling the cab top.

LouNY · Jun 3, 2022

Have you tried a valve in the heater line to keep hot water out of the system.

Tigershark · Jun 3, 2022

Lou, I have not I have a lot of skill but this AC is testing my knowledge. Is there a YouTube video showing so thing similar ?

Tigershark · Jun 3, 2022

MinnesotaEric said:
I think you should pop the six 12mm nuts and the red tab that hold the top of the tractor cab off and inspect for a pile of garbage up there. Trust me on its own the NX cab can suck junk in and with a mouse Highway, it can get much worse. PM me and I’ll share my number and can walk you through the process. Get a helper for handling the cab top.

I have great air flow through every vent. I used the wand and blew air through each one and had it come out of them all with zero debris., I’m allergic to everything mice so I feel like I would have smelled it if I had one up there. I have so much poison and traps around the barn I just don’t have many . I have to plant soybeans tomorrow but will pm you my number if you think that could be causing it. Dealer says my temps should be around 45. I average 65-70 with clean fins now

5030 · Jun 4, 2022

LouNY said:
Have you tried a valve in the heater line to keep hot water out of the system.

SOP for me on my tractors, cars and trucks. An inline WOG (ball valve) in either of the heater feed lines to cut the flow of hot coolant in the summer. The heater valves all tend to bypass coolant so I eliminate that issue. My cab roofs come off yearly for a system clean up top. New tractors may have the ac/heater units under the sear as well. Same applies but seat removal instead. I would never add refrigerant without a set of gages and the correct refrigerant.

I've switched to dry propane myself, which is compatible with all refrigerants but hard to find and not cheap.

Username Taken · Jun 4, 2022

Where's the evaporator? Can you get to and clean it? Can you evacuate the whole thing and refill it?

Is the drier okay? It could be something is obstructing the flow of the freezetone in the line somewhere.

Good luck. This is why A/C mechanics drink a lot.