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leader58 
Silver Level
Joined: 15 Oct 2013
Location: Wilmington,IL
Points: 103
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 Topic: 7020 A/C
Posted: 08 Jun 2017 at 9:24pm |
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I was in the tractor today and A/C was fine all day. I stepped out and when i got back in, it was not working, Blower is running but compressor won't engage. Looking for tips
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Joe(TX)
Orange Level
Joined: 11 Sep 2009
Location: Weatherford. TX
Points: 1682
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Posted: 08 Jun 2017 at 9:30pm |
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Check the thermal limiter near the compressor.
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1970 190XT, 1973 200, 1962 D-19 Diesel, 1979 7010, 1957 WD45, 1950 WD, 1961 D17, Speed Patrol, D14, All crop 66 big bin, 180 diesel, 1970 170 diesel, FP80 forklift. Gleaner A
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Albert
Silver Level
Joined: 11 Sep 2009
Location: NW MO
Points: 410
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Posted: 08 Jun 2017 at 9:35pm |
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Check the 3 wire limiter (fuse) if it is still mounted on the side of the front cover I would relocate it to front of condenser. If it is blown it will have a bubble on one side.
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leader58
Silver Level
Joined: 15 Oct 2013
Location: Wilmington,IL
Points: 103
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Posted: 08 Jun 2017 at 9:40pm |
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Is that a dealer item only?
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210Postin
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Joined: 06 Oct 2016
Location: Ellisville IL
Points: 151
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Posted: 08 Jun 2017 at 9:44pm |
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get at parts house gm used them for years or put a jumper wire in to get by
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leader58
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Joined: 15 Oct 2013
Location: Wilmington,IL
Points: 103
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Posted: 08 Jun 2017 at 10:06pm |
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I installed a new aluminum compressor a year ago. I am assuming that fuse is still in the tractor. What is the location? Thanks
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210Postin
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Joined: 06 Oct 2016
Location: Ellisville IL
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Posted: 09 Jun 2017 at 6:54am |
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if it is still there it should be by the compressor
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Stan R
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Joined: 03 Dec 2009
Location: MA
Points: 996
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Posted: 09 Jun 2017 at 6:56am |
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freon leak
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SteveM C/IL
Orange Level Access
Joined: 12 Sep 2009
Location: Shelbyville IL
Points: 8761
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Posted: 09 Jun 2017 at 12:59pm |
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jump low pressure switch wires and see if clutch kicks on....that'd say low on gas.They work fine till too low and shut off by low P switch
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DougS
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Joined: 03 Nov 2011
Location: Iowa
Points: 2490
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Posted: 09 Jun 2017 at 1:01pm |
 SteveM C/IL wrote:
jump low pressure switch wires and see if clutch kicks on....that'd say low on gas.They work fine till too low and shut off by low P switch |
This. Nine out of ten times this is why car A/C compressors won't kick in.
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Joe(TX)
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Joined: 11 Sep 2009
Location: Weatherford. TX
Points: 1682
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Posted: 09 Jun 2017 at 7:13pm |
I don't think it has a pressure switch. It has a thermostat and a thermal limiter controlled by a superheat switch in the compressor unless it was changed.
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1970 190XT, 1973 200, 1962 D-19 Diesel, 1979 7010, 1957 WD45, 1950 WD, 1961 D17, Speed Patrol, D14, All crop 66 big bin, 180 diesel, 1970 170 diesel, FP80 forklift. Gleaner A
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