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Still some Mitsubishi trouble.

AC Amiture on Mon June 09, 2008 2:05 PM User is offline

Year: 2000
Make: Mitsubishi
Model: Mirage 2000
Engine Size: 1.5
Refrigerant Type: r134a
Ambient Temp: 105-90
Pressure Low: 35
Pressure High: 215
Country of Origin: United States

Well, after I turned the car back to my daughter she called after about 4 hours to say it was not working again.

I suspected that it had lost charge even though I could not find a leak earlier. I had her bring it back around dark and I took another look. When I removed the valve covers to hook up I found the valve core bubbling slightly (with a brand new core). After I hooked up and turned it on i found that it was working Low was 35-39 and High was 215-220, with cold air coming out of the vent. However, thermometer said about 55 degrees. this system will usually run at 47-48 Degrees so that is slightly off.

Is there any one can tell me about how the Mitsubishi system operates?

It quit during the hot part of the day. She reported that it just started blowing hot air.

It is an expansion valve system. could that have any thing to do with it? Is it protecting it's self against over charge or over pressure?

Regarding the valve cores. I slightly loosened and reset the valve core and used some Big Blue to check it. It seems to have stopped leaking now.

Question is, why do I keep having so much trouble with these valve cores is there some secret to getting them in so they don't leak?

mk378 on Mon June 09, 2008 3:37 PM User is offline

Not working at all when hot and then working again really suggests a clutch gap problem.

If you over-pressure it the clutch will start to cycle rapidly because of the high pressure switch. Some cooling may still occur.

The secret to not leaking out the service valves is the plastic cap. The cores often have a slow leak which is of no consequence with the cap on.

AC Amiture on Mon June 09, 2008 11:04 PM User is offline

Well if it keeps up then I'll try tapping the clutch. I understand that that is the way to tell. However, it is an almost new compressor and clutch. I guess anything can go bad. I'm going to try to get some new plastic cap. The old ones are very old and the seals don't look all that great. However, It may be a problem locating them since the ones I got last time from AZ Mobil Air will not fit. It looks as though Mitsubishi used a strange thread that will not let my new red and blue caps go on. I may have to go to the dealer.

She just called. Says "It may be acting up again" "It blows cold then hot then cold" Possibly the clutch? Seems to come and go.


Edited: Mon June 09, 2008 at 11:05 PM by AC Amiture

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