HELP ASAP A/C Problem!!!
02-26-10, 01:25 AM
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HELP ASAP A/C Problem!!!
Well I tried doing a search but still cant find any reliable answers...I have a 1999 GS400 runs strong but the A/C system is bad..It only blows HOT AIR out of all vents..the compressor turns on and off normally and the air blows out strong just HOT!!!..I checked for a any leaks but couldn't find anything...the mechanic showed me that I had a low psi reading of 60psi...and that there was no resistance on the compressor(turning it with hand)...what do you think it is?
Just want to make sure before I go ahead and have him replace the compressor,cluth,drier,o-ring..etc..thanks
Just want to make sure before I go ahead and have him replace the compressor,cluth,drier,o-ring..etc..thanks
02-26-10, 02:18 PM
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21, 24 is normal when dark. 60 psi is enough for A/C to work, but it's a bit low for it to work efficiently. I agree with Infamous - leak test & recharge & check if that helps.
02-26-10, 02:49 PM
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02-26-10, 02:52 PM
#8
those are solar codes, meaning you did this at night, in the garage or whatever and there wasnt enough light on the sensors. ignore those codes
what did he say he thinks it is?
02-26-10, 03:19 PM
#9
wont show codes if he's low or the system isnt charged right
those are solar codes, meaning you did this at night, in the garage or whatever and there wasnt enough light on the sensors. ignore those codes
probably not, typically the servos involve the heat mixture. they dont or i havent seen them to fail on the cold side of them.....i
ACTUALLY around 60 is actually normal on a car if its r-134 depending on the outside temps that day. what is your high side pressure? it should be under 180.
what did he say he thinks it is?
those are solar codes, meaning you did this at night, in the garage or whatever and there wasnt enough light on the sensors. ignore those codes
probably not, typically the servos involve the heat mixture. they dont or i havent seen them to fail on the cold side of them.....i
ACTUALLY around 60 is actually normal on a car if its r-134 depending on the outside temps that day. what is your high side pressure? it should be under 180.
what did he say he thinks it is?
also, he's got enough refrigerant and his compressor isn't seized.
02-27-10, 01:07 AM
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There are two air mix servos - driver's and passenger's. Stuck servo should throw 41 (passenger's side) or 46 (driver's side) error code. I think it's unlikely that both of them fail and no error is displayed.
I'd try replacing the control panel with a known good first, then if that doesn't help I'd rip the air box apart to see what's going on there.
Edit: you can also try entering the actuator check mode: first enter diagnostic mode as described before; wait until error codes are displayed; press R/F - the temperature display should cycle through numbers 0 - 9 now. Using driver side temp switch set the display to 3. If you have freezing air now, it's the temperature sensors. If you have ambient, it's the compressor; if it's still hot, it's either the panel or the air box.
I'd try replacing the control panel with a known good first, then if that doesn't help I'd rip the air box apart to see what's going on there.
Edit: you can also try entering the actuator check mode: first enter diagnostic mode as described before; wait until error codes are displayed; press R/F - the temperature display should cycle through numbers 0 - 9 now. Using driver side temp switch set the display to 3. If you have freezing air now, it's the temperature sensors. If you have ambient, it's the compressor; if it's still hot, it's either the panel or the air box.
Last edited by ydjy; 02-27-10 at 10:54 AM.
03-01-10, 10:39 AM
#11
There are two air mix servos - driver's and passenger's. Stuck servo should throw 41 (passenger's side) or 46 (driver's side) error code. I think it's unlikely that both of them fail and no error is displayed.
I'd try replacing the control panel with a known good first, then if that doesn't help I'd rip the air box apart to see what's going on there.
Edit: you can also try entering the actuator check mode: first enter diagnostic mode as described before; wait until error codes are displayed; press R/F - the temperature display should cycle through numbers 0 - 9 now. Using driver side temp switch set the display to 3. If you have freezing air now, it's the temperature sensors. If you have ambient, it's the compressor; if it's still hot, it's either the panel or the air box.
I'd try replacing the control panel with a known good first, then if that doesn't help I'd rip the air box apart to see what's going on there.
Edit: you can also try entering the actuator check mode: first enter diagnostic mode as described before; wait until error codes are displayed; press R/F - the temperature display should cycle through numbers 0 - 9 now. Using driver side temp switch set the display to 3. If you have freezing air now, it's the temperature sensors. If you have ambient, it's the compressor; if it's still hot, it's either the panel or the air box.
i did a write up on how to change them check my posts
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