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hondacrazy
New User
Apr 22, 2010, 8:29 PM
Post #1 of 4
(2803 views)
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hell like title says 93 honda civic with 1.5 motor the ac is having problems working.. like not all the time will it kick on when you start the car sometimes it will work if you play around with it on and off alot of times and other times you wont get it at all to work and if you do get it to work it works for probley 15 mins and it seems to kick it self off and blows regular hot air around.. i have replaced both relays which are right above the cooling fan which got it to work better but still after 15 mins it wont work untill car sits for 5 - 6 hours and cools back down and it will kick back on and work for the next 15 mins.. the car used to have the old system in it and the peopl i bought the car from said that they put new pump in to run newer system.. any idea's will be very helpfull i live in florida and i need air.. thanks
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Apr 23, 2010, 4:57 AM
Post #2 of 4
(2797 views)
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Re: 1993 ac problems
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? My charts show all 93 Civics used R-12 (Freon) for a refrigerant. That was the switchover model year to usually 134a. It would help to know just what you are using if you know.
I can only guess so far but there are some observations you can make to help. You'll need gauges/manifold set to be able to post pressures at some point. Another must is a good fast thermometer. I choose the cheap, wired, IN/OUT household thermometers - not all are fast, most are. This way you can get output vent temps and ambient temps (not a forecast) of air coming in right in front of the grille. That's the temp the car is dealing with, not one on the wall or tree or what the weather forecast says. Pressures will be highly dependant on what the temps are that the car is dealing with.
It's old enough for about any issue but the most common is low charge. That is NOT to say adding is called for as it may be overcharged now! This doesn't hold much so every tidbit counts.
See if you can watch it drip condensate (water) when it does cool. That would help just for info.
Does any plumbing frost underhood while it's working?
Start there and let's see what we can find out,
T
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hondacrazy
New User
Apr 23, 2010, 1:40 PM
Post #3 of 4
(2791 views)
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Re: 1993 ac problems
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from my understanding it had the old r-12 system in the car and the people that owned it befor had the 134a system put in it which it worked when i got car for a year and freon leaked and i put more in it i have a gauge for low side.. from what im seeing on other post online on this website that the climate control might lose signal to the clutch cause the fan cycles like it should be workin but clutch not being enabled.. i have another 95 civic i was gunna take climate control out and see if it helps or fixes it befor i buy one.. let you know what i find
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Apr 23, 2010, 2:18 PM
Post #4 of 4
(2787 views)
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Re: 1993 ac problems
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OK - you put more refrigerant in thinking it was low but I bet you don't have a clue how much you put in - right? A 93 Civic is listed as capacity of 22 ounces of R-12 originally and I've seen them work well with proper pressure at about 60-70% of original weight when using 134a. That means from a total vacuum about 13.2 ounces would at least start to cool! How much did you add?
System is set up to shut down if high heat (I think this did that) or if a high pressure cut out was installed.
Know this. 65 +/- of all lack of cooling issues are improper refrigerant levels. You can't know the exact level unless the person who converted/retrofitted this car posted the amount for you or you will have to start from a well held vacuum to no more than 60% as stated for starters and take readings, both high and low pressures at what temps with observations of clutch to compressor staying engaged and fans operating properly.
If the product you added contained sealer, oils or who knows all bets are off. Low side info only, charging can be done but you still need to observe high side pressure or temp of high side to know when to quit,
T
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