94jdmdb8

hi, trying to get my a/c to work. it does not turn on at all when i turn on the ac. compressor does not click and fan does not turn on, but both fans turn on at operating temperature via coolant temperature switch. hot wired the ac compressor and it clicks on ok. both relays work fine and is getting power. tried jumping the ac pressure switch with a paper clip, nothing turns on. there is enough pressure in the system.

also ran all the tests according to my helms manual and my haynes manual. so kinda stuck. any help will be appreciated. if i remember any other symptoms or tests that ive performed ill post it up. Thanks

94jdmdb8

need help asap

teggy25

hey man you might wanna check this link
it helped me

http://www. honda-tech. com/zerothread/1665946

94jdmdb8

thanks

God-Driven

Are you sure there is enough freon in the system? I think it holds around 3 cans.
First check for power on the wire for the clutch, if there is no power check if the relay is clicking, also check for a signal comming out of the switch on the a/c control unit, check for any broken wires.
Use a test light or volt meter to check the fuses

94jdmdb8

yes there is enough freon. took it to a a/c recharge place today. they tried to charge it, but said that the compressor wont kick on because of electrical, or other, issues.

checked power at both compressor clutch and condensor fan relays. both have power and both relays work fine. the only thing that causes the relay not to click is the circuit coming from the ecu. 12v constant, ignition, and #30 supply is fine. hot wired it and clutch ticks and fan comes on. all fuses are fine.

i will have to check the a/c switch then.

thanks bro

anything else i can check? please let me know. even tried to bypass the pressure switch to see if anything kicks on, but nothing. what is the next thing to check? what can be defective?

all-mtr-teg

A/C thermostat or diode?

94jdmdb8

according to the helms, i should try to replace the thermostat. how do i remove it? the wire seems to lead all the way to the back of the dash where i cant reach.

i will test the diode and see how it goes.

thanks

94jdmdb8

just tested the diode. works perfectly fine. a/c pressure switch is fine.

there are 2 wires from the ecu that goes to the clutch and fan relays. when i ground the 2 leads they both turn on. they are A15(ACC)blk/red and B5(ACS)blu/red. so any chances it's my ecu? they each go to #85 on the relay.

94jdmdb8

anything else?

God-Driven

what year is the integra?, I'll give you some more info later on today.

94jdmdb8

its a 94 RS. looking forward to your reply.

narrowed it down to either:
1. thermostat
2. ecu?
3. climate control(unlikely)

b18c1ej8

i had this same problem and did the same diagnostics u did, check the underhood fuse box and find your fuse for your compressor i changed out my compressor and realized it was the fuse, also make sure your fan is even getting power

94jdmdb8

already checked that fuse, and all other fuses are fine. nothing wrong with condensor fan or the fuse, relay, or wiring. both fans come on at operating temperature, but nothing for a/c

AW

Can you spin the compressor even though the clutch engages? Maybe the compressor is seized or broken?

94jdmdb8

no with the clutch engaged it wont spin.

does anyone know how to remove the a/c thermostat?

all-mtr-teg

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 94jdmdb8 &raquo;</TD></TR><TR><TD CLASS="quote">no with the clutch engaged it wont spin.

does anyone know how to remove the a/c thermostat?</TD></TR></TABLE>

You gotta remove the evaporator, the thermostat will be mounted above the fins on the evaporator. You just need to remove the glove box then drop the evaporator and blower motor. Get yourself a $20 Haynes manual from autozone, that's what I followed, it's actually a pretty good manual.

AW

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 94jdmdb8 &raquo;</TD></TR><TR><TD CLASS="quote">no with the clutch engaged it wont spin.
does anyone know how to remove the a/c thermostat?</TD></TR></TABLE>

If you are bypasssing the sensors and powering the clutch to engage, the compressor should spin. If it is seized the belt will be making horrible sounds when the clutch engages.

94jdmdb8

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by all-mtr-teg &raquo;</TD></TR><TR><TD CLASS="quote">

You gotta remove the evaporator, the thermostat will be mounted above the fins on the evaporator. You just need to remove the glove box then drop the evaporator and blower motor. Get yourself a $20 Haynes manual from autozone, that's what I followed, it's actually a pretty good manual.</TD></TR></TABLE>

i already have that haynes sorry for asking. anyways i went to the yard today to pick up 2 ac thermostats for free. i just cut the wire and wired in the new one and the a/c started right up. so i am really happy

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AW &raquo;</TD></TR><TR><TD CLASS="quote">

If you are bypasssing the sensors and powering the clutch to engage, the compressor should spin. If it is seized the belt will be making horrible sounds when the clutch engages. </TD></TR></TABLE>
yes compressor did spin freely and made no noise; nor did the belt.

well that concludes this issue. thanks to all that helped me. if anyone has the same issue, go ahead and try to replace the thermostat.

dohcFTW

el_ato

those any on have a pic on the ac thermostat? i dont know what it looks like.thanks

jdmer329

where are you located?

JTECHDC2

Where does the power from the thermostat come from? I try testing mine and has no power.

JTECHDC2

bump

JTECHDC2

bump