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Mystery- first got cold, then back to warm

pippo on Sat March 31, 2012 12:22 PM User is offline

People,

1995 Voyager 3.3L, . I first checked psi, low side was 10 (fluctuated from 10-50 from comp on/off).

High was 60-65 (fluctuated from comp on/off)

So, I added a can of gas, and suction line got very cool but not cold, psi low now is 32-65 (comp on/off) , high: 140-150 (comp on/off)

As I just started to add from a new can of gas, before long, the aluminum tube on suction line went to warm/ambient temp. Man, not sure whats going on. Could this be a bad expansion valve/H block? Any other ideas, guys?

Thanks!!!

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beware of the arrival

pippo on Sat March 31, 2012 1:32 PM User is offline

OK, just checked it again, and noticed that the H block (aluminum rectangular "box" which, looks like holds the TEV) is very cold to touch! But, still, no cold ac in ducts, and no cold low pressure line near comp. Also, comp goes on for 3 seconds, then off for about 5 seconds. isnt this cycling too fast? Does that mean bad TEX valve, and why does it behave this way?

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beware of the arrival

Edited: Sat March 31, 2012 at 1:41 PM by pippo

mk378 on Sat March 31, 2012 2:12 PM User is offline

Looks like it was almost empty when you started. Find the leak and repair it. One can is not going to be enough to make it work.

pippo on Sat March 31, 2012 3:44 PM User is offline

OK, but just curious- how/why is the H block ice cold and still no cold ac in the cab? I realize I have a leak, although, could be a slooooow leak.....

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beware of the arrival

mk378 on Sat March 31, 2012 3:59 PM User is offline

When you have a small amount of liquid going, it can get very cold right at the point of expansion. But it can't cool the whole evaporator.

pippo on Sat March 31, 2012 4:51 PM User is offline

ok, thanks again, MK.

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beware of the arrival

Dougflas on Sun April 01, 2012 7:50 PM User is offline

"I'm hungry. I'm hungry" That is your evap yelling at you because you're starving it from refrigerant. H Valves have been known to stick I had one stick right out of the box. A knock on it with a screwdriver handle fixed that.

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