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Shannon Martin
Shannon Martin, ASE Certified Master Technician
Category: Chevy
Satisfied Customers: 589
Experience:  over 20 years as a line technician both asian and domestic.
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1999 chevy tahoe: rear air..a/c works fine, rear blows hot.Is

Customer Question

1999 chevy tahoe w/rear air. Front a/c works fine, rear blows hot.Is there more than one orafice? Any suggestions?
Submitted: 5 years ago.
Category: Chevy
Expert:  Shannon Martin replied 5 years ago.

Shannon Martin :

hi i am shannon i will help on this issue

Shannon Martin :

yes there is two

Shannon Martin :

you can test the suction side temp at the rear evaperator

Shannon Martin :

it should be as cold as the front

Shannon Martin :

if it is you need to check the blend door operation

Shannon Martin :

it the rear

Shannon Martin :

a quick test would be to pinch off the rear heater corflow

JACUSTOMER-1abfeg86- :

the rear discharge line is warm at the y off the dryer

Shannon Martin :

you need the test at the rear evaporator

Shannon Martin :

that should be the same as the front suction line

JACUSTOMER-1abfeg86- :

could the orafice be clogged and where is it located for the rear unit

Shannon Martin :

lust like the front .the rear orafice has a filter screen in front of it

Shannon Martin :

did you have a compressor exploistion

JACUSTOMER-1abfeg86- :

no but it was replaced

Shannon Martin :

if not it will be hade to get matiral into the system

Shannon Martin :

will then it could be passable but try thr heater core hose pinch off first. i,ll look up the locatrion of the orafice and post it to you

JACUSTOMER-1abfeg86- :

is the front orafice in the suction line off the dryer before the Y leading to the rear unit

Shannon Martin :

no it should be in the lquid line just before the evaperator

Shannon Martin :

and the rear should be the same

Shannon Martin :

but i will look that up .

JACUSTOMER-1abfeg86- :

please do

Shannon Martin :

i will need to switch to Q&A mode

Shannon Martin :

it will take a few

JACUSTOMER-1abfeg86- :

ok

Shannon Martin :

do you have any more question before i go?

JACUSTOMER-1abfeg86- :

are you going to e-mail or what?

Shannon Martin :

no i will post to this site .but you will get an e-mail when its ready

JACUSTOMER-1abfeg86- :

ok

Expert:  Shannon Martin replied 5 years ago.
it will take some time . i,ll post bake soon
Expert:  Shannon Martin replied 5 years ago.

hear is the rear expansion valve.

 

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Expert:  Shannon Martin replied 5 years ago.
did this info help. is it what you needed? please let me know. thanks shannon