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Wayne
Wayne, Journeyman
Category: Medium and Heavy Trucks
Satisfied Customers: 8920
Experience:  worked on, Gmc, Macks, Freight liner,Mercedes Benz,,Ford, sterling
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I have a 07 international 4300 with a/c problem it will work

Customer Question

I have a 07 international 4300 with a/c problem it will work fine then stop changed the 2 thermistors and high pressure switch when sending power from a power probe compressor works went to wire coming from blue plug on the driver side firewall and sent power and compressor works refilled and oiled system to 1.80
Submitted: 1 year ago.
Category: Medium and Heavy Trucks
Expert:  Wayne replied 1 year ago.
Hi I'm Wayne
I will help you with this
what are your pressures
running and then when it cuts out
also did you do any work on the system
that this has happened
Let me know
Customer: replied 1 year ago.
30 low 200 high no other work on the system
Customer: replied 1 year ago.
110 low and 110 high when it cuts out
Expert:  Wayne replied 1 year ago.

Hi Thank you for that

if the pressures equal , as you just showed me

that is the compressor failed inside,or failing

what it happening is the reed valves

are letting hot pressure gas into low side

that will shut the compressor down

If this Helped you please Rate My Answer 3 stars or more

If you need more info

Use the request Button, not a Poor/Bad Rating

Thank You

Wayne

Customer: replied 1 year ago.
Ok just did the pressures again it while as running 40 low and 260 high and when it cuts off 105-110 high and same for low I don't no if it's a coincidence but if I wiggle the wire harness it seems to cut in and out
Expert:  Wayne replied 1 year ago.

Hi Thank you for that

no that makes more sense now,

yes fault is in the harness, that is why it cut in and out, the pressure would equalize,

showing a faulty compressor, need to open the harness ans check them wires

for loose connections, and/or poor connections

If this Helped you please Rate My Answer 3 stars or more

If you need more info

Use the request Button, not a Poor/Bad Rating

Thank You

Wayne

Customer: replied 1 year ago.
Ok the only thing that makes me question the harness is the driver who drives the truck says it runs for 3 hours and stops for the day
Expert:  Wayne replied 1 year ago.

Hi

Well look at this way

if yoou wiggle it it cuts in and out

so it is a connection, loose or dirty

Expert:  Wayne replied 1 year ago.
Hi ***** following up with you
did my answer help you
Let me know
Wayne

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