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2003 Civic Ex ac

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Old Jun 26, 2023
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2003 Civic Ex ac
Ac compressor wont run unless jumped at the fuse box.
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Old Jun 26, 2023
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Re: 2003 Civic Ex ac
So figure out why. Low refrigerant? Failing relay or fuse? Failing HVAC controls?
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Old Jun 26, 2023
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Re: 2003 Civic Ex ac
Yep need to do some proper diag
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Old Jun 26, 2023
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Re: 2003 Civic Ex ac
All relays and fuses are good. System is good on refrigerant
Tested pressure switch its good as well
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Old Jun 27, 2023
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Re: 2003 Civic Ex ac
What pressure did you read, high and low side?
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Old Jun 27, 2023
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Re: 2003 Civic Ex ac
low side
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Old Jun 27, 2023
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Re: 2003 Civic Ex ac
Need both sides, and actual psi numbers
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Old Jun 27, 2023
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Re: 2003 Civic Ex ac
can i check highside with one of those gauges that come on the refills u can buy?
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Old Jun 27, 2023
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Re: 2003 Civic Ex ac
Not likely. At a minimum you need to check the low pressure side. Should be enough to know if there's enough refrigerant, but not enough to now if the system is working properly.
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Old Jun 27, 2023
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Re: 2003 Civic Ex ac
the low side is at 50psi
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Old Jun 27, 2023
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Re: 2003 Civic Ex ac
You can get a set of the proper gauges on amazon for pretty cheap
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Old Jun 28, 2023
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Re: 2003 Civic Ex ac
anything else i can try before i spend unnecessary money?
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Old Jun 28, 2023
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Re: 2003 Civic Ex ac
At 50 psi, what's the outside temperature? Compressor should not be running when you check. You'll have to remove your jumper or check when the engine is off.
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Old Jun 28, 2023
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Re: 2003 Civic Ex ac
im going to check the psi again and the temp again
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Old Jun 28, 2023
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Re: 2003 Civic Ex ac
Pressure should roughly match ambient temperature. If it's 50F outside, pressure should be around 50 psi.
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Old Jun 28, 2023
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Re: 2003 Civic Ex ac
its at just about 50psi at 80 degrees😬
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Old Jun 28, 2023
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Re: 2003 Civic Ex ac
should i charge it more?
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Old Jun 28, 2023
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Re: 2003 Civic Ex ac
That is low but the minimum to turn on the compressor is like 28 psi.
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Old Jun 28, 2023
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Re: 2003 Civic Ex ac
Any other reasons why its not kicking on?
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Old Jun 28, 2023
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Re: 2003 Civic Ex ac
Originally Posted by BrotatoChip
So figure out why. Low refrigerant? Failing relay or fuse? Failing HVAC controls?
See previous replies.
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