LBZ: I can get the ac system to work if I put water over the condenser

Nhill22189

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Jun 6, 2015
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What does this mean? I sprayed water over the condenser to help flush and then the ac came on for about 20mins. Then it shut off unless I put more water over it. Help please?
 

clrussell

pro-procrastinator
Sep 23, 2013
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Fan clutch is bad or the cooling stack Is plugged up.


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Porno Joe

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Oct 11, 2010
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We are probably gonna need some more info about the symptoms too.

like it wasn't working at all and then came on? or it was blowing hot and then you sprayed water and it started blowing cold?
 

Nhill22189

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Jun 6, 2015
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Well I have checked everything in the ac system. Changed out switches high low ambient temp switch. System only comes on if it is cold outside around 65 or below or it will come on if I put water over the condenser. The truck temp and trams temp is all normal.
 

clrussell

pro-procrastinator
Sep 23, 2013
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Does the ac work running down the road? If so replace the fan clutch and clean the cooling stack at the same time.


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Minnesota DMAX

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Jan 11, 2015
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I wonder if the ambient temp sensor has anything to do it

02 CCSB efi live,head studs, S&B intake, 4" straight pipe to 5"
 

Chevy1925

don't know sh!t about IFS
Staff member
Oct 21, 2009
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We need to know what the pressures are at 2k RPM, in park, a/c on max and blower on max as well as ambient temp
 

Nhill22189

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Jun 6, 2015
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The ambient temp is 85. I had the system vacuumed and recharged. All pressure levels read right where they should be. No it doesn't not work driving down the road unless I wet the condenser first the drive it will last about 30 mins.
 

Chevy1925

don't know sh!t about IFS
Staff member
Oct 21, 2009
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The ambient temp is 85. I had the system vacuumed and recharged. All pressure levels read right where they should be. No it doesn't not work driving down the road unless I wet the condenser first the drive it will last about 30 mins.

that doesnt tell me a thing. i need what i asked for to give you some kind of correct diag based off factual information from the truck. we are not there to see what you see ;)
 

clrussell

pro-procrastinator
Sep 23, 2013
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I wonder if the ambient temp sensor has anything to do it

02 CCSB efi live,head studs, S&B intake, 4" straight pipe to 5"


I think you might be on to something.. Now that we have more info


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malibu795

misspeelleerr
Apr 28, 2007
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If the fan clutch was bad wouldn't the truck over heat?

not necessarily.. . fan clutches do wear out.. the engaging temp at which the fan comes on slowly rises... most noticeable is hot days at idle or low speeds... AC sucks truck gets sluggish and lethargic..

the fan at idle should move enough air to hold a 8x11 sheet of paper against the condenser... I have a after market clutch.. this is a 4x6 piece of paper at idle.
10653525_10205453697995437_7932063073090040466_n.jpg


I would start with checking the cooling stack.. making sure its clean.. I prefer using pressure washer with a wide fan tip. running the tip parallel to the fins as to not bend them...
air is another viable method to cleaning each cooler out..

amazon has a hadyen 2886 fan clutch for ~100.00 to your door. I run it(actually wore one out on my hotshot) couple others run it and and like it. drop in replacement.
 

Minnesota DMAX

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Jan 11, 2015
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Does your temp on the rear view mirror say the correct temp that it is outside?

02 CCSB efi live,head studs, S&B intake, 4" straight pipe to 5"
 

Awenta

Active member
Sep 28, 2014
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CT
Sounds like it could be over filled.

And Joe, the low side pressure is directly related to the ambient temperature.

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Minnesota DMAX

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Jan 11, 2015
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Mine wouldn't work for crap. Checked low pressure side. Way over filled, almost 100psi. I bled it down to 40 it works great now. Maybe yours is over filled

02 CCSB efi live,head studs, S&B intake, 4" straight pipe to 5"