Ac issues!!!

[smurfcivic]

Wondering if anyone can give me some ideas. The problem is after having the air on for about 45 minutes it stops blowing hard. U can still feel some cool air and hear the blower running but that's it. If I cut it off every 30 minutes long enough to smoke a cig and turn it back on then it works the rest of my hour drive from work.
Can someone help a brother out? It's getting hot here fast!!

 

[1993GMCSierra]

If you leave it on "Hi", does it slow down eventually too, or only on Med-low, Med, or Med-Hi?

 

[1997chevydriver]

Sounds like your ac core is freezing up

 

[smurfcivic]

Both med-high. I ran it on low the other day and it also did the same.

 

[smurfcivic]

Also might I add that when it does this I get a little drip action on my pass floor board.

 

[twomanymontes]

Sounds like your ac core is freezing up

X2! It sounds like the Evaporator core is freezing up due to humidity. Your low pressure switch may be faulty and not allowing the system to cycle.

 

[smurfcivic]

I actually replaced it a few months back. Gonna hook up the gauges this weekend and check freon. I'm thinking it may be to high but haven't added any in over a year.

 

[Dobby97]

Did you ever fix this problem?
Mine is kinda doing the same thing. When its on high it blows like med or less sometimes and also if you get on the gas hard it wlll kick it up back to blowing hard like it should. Doesn't always blow harder when you punch it but it helps sometimes. Also after it does start to blow hard from hitting the gas, it doesn't stay for long.

 

[96Z71ECSB]

Also might I add that when it does this I get a little drip action on my pass floor board.

Actually the evaporator is not freezing, it's filling up with condensation (water).
Unplug the drain tube that goes through the firewall. It's at the passenger firewall and it's a rubber tube about 3 or 4 inches long.
Blow it out with compressed air or use a stiff piece wire to unplug it.
Beware: you may get water out of it.