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Wayne, Journeyman
Category: Medium and Heavy Trucks
Satisfied Customers: 8280
Experience:  worked on, Gmc, Macks, Freight liner,Mercedes Benz,,Ford, sterling
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Have an issue with my 2007 international truck : No power

Customer Question

Have an issue with my 2007 international truck
JA: We'll do all we can to help. Tell me a bit more about what's going on so the Heavy Equipment Mechanic can help you best.
Customer: No power going to A/c compressor
JA: Is there anything else the Heavy Equipment Mechanic should be aware of?
Customer: Only negative at both wires
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Heavy Equipment Mechanic about your situation and then connect you two.
Customer: Do you guys think it's the thermistors like the lay problem posted on here
Submitted: 4 months ago.
Category: Medium and Heavy Trucks
Expert:  Wayne replied 4 months ago.

Hi I'm Wayne

I will help you with this

did you check the fuses

let me know

Customer: replied 4 months ago.
Customer: replied 4 months ago.
There is no power coming out of driver side firewall
Although there is power going into the unit on the wall, just not coming out
Customer: replied 4 months ago.
Is the plug mounted on firewall under fuse distribution block considered the body controller
Expert:  Wayne replied 4 months ago.

Thank you for that

ok open the dash and check for power at the switches

Customer: replied 4 months ago.
All the climate control switches function
Customer: replied 4 months ago.
What switch and where should we check exactly
Customer: replied 4 months ago.
Are you there?
Customer: replied 4 months ago.
Hi Wayne
Can you help us
Expert:  Wayne replied 4 months ago.


Yes I am here ,very busy day

check the power at the panel

then check the power on the low and hi pressure switches under the hood

what model truck is this

also put your gauges on the compressor and tell me the pressures

Customer: replied 4 months ago.
2007 international 4300
Dt 466
Only find sensor on the low side
Where would high side be
Expert:  Wayne replied 4 months ago.


It is on the receiver tank/accumulator

also let me know the pressures

Expert:  Wayne replied 4 months ago.

Hi Do this 1st

power to the ac compressor comes from the ESC located on the driver side firewall if you lift hood you will see part of the module sticking out with 3 plugs BLUE, BROWN, GRY. there is also 2 thermistors on the pass side one one the accumulator and one on the line below it. unplug pigtail and check pins for damage.

the blue plug supplies power to the compressor if u look at the blue
plug unplugged it would be the top right

also the most likely problem is ESC, that failed

Hi If this helped you

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