ac pressure switch replacement -

LinkBack Thread Tools Search this Thread
Old 08-02-2010, 09:44 AM
Junior Member
Thread Starter
Join Date: Jul 2010
Posts: 2
Default ac pressure switch replacement

I have a 1996 honda civic, A/C not working (compressor not engaging-just random on-off). I had been suggested to check the cycle switch by shorting the 2-prong connector, "if it does not engage the compressor, then it's bad". with this information I assume it's bad. My question is I can see the cycle switch on top of the accumulator, but not sure if I should remove it with a wrench. Wouldn't the coolant leak out if I take it out? any idea how I should go about it?.. thanks..
Reply With Quote
Old 08-02-2010, 10:58 AM
RonJ's Avatar
Recognized HCF Member

Join Date: Sep 2007
Location: Houston, Texas
Posts: 9,453

So when you jumped the switch connector, did the compressor clutch engage without switching on and off? Have you measured the refrigerant pressures on the high and low sides?
Reply With Quote
Old 08-03-2010, 06:03 AM
Junior Member
Thread Starter
Join Date: Jul 2010
Posts: 2
Default ac pressure switch replacement

No I have not checked pressure on both Low and High. I did check the Low when I added refrigerant. funny thing, yesterday it the compressor was engaging fine and worked fine, but I think it was because it was 85degrees. It has been 94degrees the last couple of weeks here. I'm still not sure about the pressure switch (cycle switch), is it true that if you jump the two prongs together the compressor should engage? (when I tried it it did not engage).

Last edited by jose4autos; 08-03-2010 at 06:06 AM.
Reply With Quote
Old 08-03-2010, 11:33 AM
Recognized HCF Member
Join Date: Jun 2007
Posts: 10,023

Since it did [i]not[i] engage when you jumped the switch, something else is wrong.

Plug everything back in as stock and note what happens when you press the button. Does the condenser fan run? Does the idle speed increase? Is power applied to the compressor wire? Usually when the system works intermittently it is because the compressor clutch gap is too wide.

By the way, unlike most American cars, the system does not "cycle" on pressure. The switch it is there to shut down the compressor in case of abnormally high or low pressure. Under all normal operating conditions, the switch stays closed. The refrigerant must be removed before unscrewing the switch in the unlikely event that replacement is necessary. While still installed, test the switch with an ohmmeter it should be a closed circuit.
Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
high suction pressure with low discharge pressure lunger Mechanical Problems & Technical Chat 1 07-10-2011 03:50 PM
P0108 Manifold Absolute Pressure/Barometric Pressure Circuit High Input phan10m Mechanical Problems & Technical Chat 3 07-07-2007 05:27 PM
what is a vtec oil pressure switch? ic892003 Engine & Internal 0 03-04-2007 09:37 PM
I need your help! Code 22 - VTEC oil pressure switch - Defective circuit or unplugged b16Ek4 Mechanical Problems & Technical Chat 3 06-20-2005 11:59 PM
Need your help! CEL code 22 VTEC pressure switch b16Ek4 Mechanical Problems & Technical Chat 7 05-25-2005 09:48 AM

1996, 98, 99, ac, air, civic, conditioner, conditioning, cycling, honda, locaion, pressure, remove, shorting, switch

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -8. The time now is 02:51 AM.