AC Teperature
Thread Starter
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Senior Member
Joined: Aug 2021
Posts: 210
From: Port St Lucie, Florida
AC Teperature
So AC/Heat fan, temp setting all seem to work. AC blows cold, but only at speeds above idle. Live in FL, and if you start off in a warm/hot interior it cools down as long as traffic is moving. But sitting at idle at a light it seems as tho the air isn't quite as cold coming out the vent as when running at speed. Wondering if this would be a low freon condition, or possibly a belt tension or some other issue?
Senior Member
Joined: Jul 2012
Posts: 8,999
From: C-Town
So AC/Heat fan, temp setting all seem to work. AC blows cold, but only at speeds above idle. Live in FL, and if you start off in a warm/hot interior it cools down as long as traffic is moving. But sitting at idle at a light it seems as tho the air isn't quite as cold coming out the vent as when running at speed. Wondering if this would be a low freon condition, or possibly a belt tension or some other issue?
Thread Starter
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Senior Member
Joined: Aug 2021
Posts: 210
From: Port St Lucie, Florida
Do you have a probe thermometer? Insert into the center dash vent, max a/c on idling in park, and get your garden hose spray nozzle and spray water into the condenser. Does the temp drop at the vent & what's the temp reading?
Senior Member
Joined: Apr 2010
Posts: 1,006
From: Deep South Louisiana
Top few issues that could cause this;
Low air flow across the condenser
Low refrigerant lvl
Compressor efficiency loss
Have you done any AC work recently?
Have you done any work in the radiator area recently?
Low air flow,
Neal
Low air flow across the condenser
Low refrigerant lvl
Compressor efficiency loss
Have you done any AC work recently?
Have you done any work in the radiator area recently?
Low air flow,
- check the radiator fan clutch
- check for blockage
- Need operating pressures to diagnose
- look at all fittings/connections on the suction/discharge hoses/pipes for oil seepage (possible leak)
- usually shows up at idle
- pressures will tell the story
Neal
Thread Starter
|
Senior Member
Joined: Aug 2021
Posts: 210
From: Port St Lucie, Florida
Top few issues that could cause this;
Low air flow across the condenser
Low refrigerant lvl
Compressor efficiency loss
Have you done any AC work recently?
Have you done any work in the radiator area recently?
Low air flow,
Neal
Low air flow across the condenser
Low refrigerant lvl
Compressor efficiency loss
Have you done any AC work recently?
Have you done any work in the radiator area recently?
Low air flow,
- check the radiator fan clutch
- check for blockage
- Need operating pressures to diagnose
- look at all fittings/connections on the suction/discharge hoses/pipes for oil seepage (possible leak)
- usually shows up at idle
- pressures will tell the story
Neal
Senior Member
Joined: Jul 2012
Posts: 8,999
From: C-Town
All good inf, thank you. Yes, brand new GM OEM radiator replaced 2 months ago. Didn't notice any evidence of leakage at joints, but as stated I will need to have it checked with gauges to determine compressor/system. So will be a few days before I can get back to getting Temps of ambient & duct outlet with probe at idle & operational speeds. One thing I have noticed lately is what seems to be a marked increase of engine "roar", esp at take off, which could be the fan clutch has gone bad. Coolant/tranny Temps are staying pretty normal. Will let all of you folks know what I find later this week.
Thread Starter
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Senior Member
Joined: Aug 2021
Posts: 210
From: Port St Lucie, Florida
Not lack of tester....LOL....lack of time. Lot of busy life stuff for the next few days. I have the tester....😁