Hummer H3 For the Hummer driver who wants the rugged look and off road capabilities of the Hummer, but in a smaller size and with a more fuel economy friendly engine.

Ac question

Thread Tools
 
Search this Thread
 
Old Jul 12, 2020 | 07:23 PM
  #21  
hummerz's Avatar
Senior Member
Joined: Jul 2012
Posts: 8,999
From: C-Town
Default

When you get the vent temp you can use this as a guide:



 
Old Jul 12, 2020 | 07:46 PM
  #22  
bronxteck's Avatar
Senior Member
Joined: Apr 2019
Posts: 3,192
From: BX NY North East
Default

Originally Posted by hummerz
24oz is the proper amount. AGAIN, WHAT IS THE TEMP AT THE CENTER VENT? A/C ON RECIRC ON FAN SPEED 1, CLOSE ALL OTHER VENTS AND INSERT THERMOMETER IN CENTER VENT. ALSO, CLEAN OUT DRAIN TUBE TO HVAC CASE.(LOWER FIREWALL PASSENGER SIDE)



well then mr wizard how much was already in his system already?
 
Old Jul 12, 2020 | 08:12 PM
  #23  
hummerz's Avatar
Senior Member
Joined: Jul 2012
Posts: 8,999
From: C-Town
Default

Originally Posted by bronxteck
well then mr wizard how much was already in his system already?
No idea??? 24oz is the capacity, I haven't received a clear amount of total charge, so I'm using the pressures(still within specs), and waiting for vent temp reading. With the high/low readings at 330/40 & 105ambient, that would point to a restriction, most likely the expansion valve.
 
Old Jul 13, 2020 | 08:56 AM
  #24  
NFS's Avatar
NFS
Thread Starter
|
Senior Member
Joined: May 2016
Posts: 739
Default

Originally Posted by hummerz
No idea??? 24oz is the capacity, I haven't received a clear amount of total charge, so I'm using the pressures(still within specs), and waiting for vent temp reading. With the high/low readings at 330/40 & 105ambient, that would point to a restriction, most likely the expansion valve.
I sprayed inside it it dipped few times then it start to drop water drops when ac is on so it’s not glocked . I can hear the compressor kick in and off now that it’s only 90 degrees
this when compressor stop


this when compressor running. Is that normal. It shows on the low side 30 but the ac is cold now


 

Last edited by NFS; Jul 13, 2020 at 09:20 AM.
Old Jul 13, 2020 | 04:27 PM
  #25  
bronxteck's Avatar
Senior Member
Joined: Apr 2019
Posts: 3,192
From: BX NY North East
Default

the gauges you have have a temperature ring the second ring. when the system is off and truck not running the high side and low side should equalize after sitting. look at the temperature ring on both when it does equalize. both gauges should read the same pressure at the given ambient temperature. so for correlation at 90* F it should have a pressure of about 104 - 105 psi hard to tell from the angel of the picture when properly charged. if the readings are too low or too high it will not match the outside air temp. both high and low need to match pressures. this is what is called a static pressure test. it is a quick diagnostic test to see if you are over or under on refrigerant. when you have the proper gauge set. not all gauge sets have the ambient temp reading on the dial
 

Last edited by bronxteck; Jul 13, 2020 at 04:32 PM.
Old Jul 13, 2020 | 06:07 PM
  #26  
hummerz's Avatar
Senior Member
Joined: Jul 2012
Posts: 8,999
From: C-Town
Default

Good info,+ monitor the amount of time it takes to equalize. I'm still waiting on vent temp?

 
Old Jul 13, 2020 | 07:01 PM
  #27  
NFS's Avatar
NFS
Thread Starter
|
Senior Member
Joined: May 2016
Posts: 739
Default

Originally Posted by bronxteck
the gauges you have have a temperature ring the second ring. when the system is off and truck not running the high side and low side should equalize after sitting. look at the temperature ring on both when it does equalize. both gauges should read the same pressure at the given ambient temperature. so for correlation at 90* F it should have a pressure of about 104 - 105 psi hard to tell from the angel of the picture when properly charged. if the readings are too low or too high it will not match the outside air temp. both high and low need to match pressures. this is what is called a static pressure test. it is a quick diagnostic test to see if you are over or under on refrigerant. when you have the proper gauge set. not all gauge sets have the ambient temp reading on the dial
so that temperature should match when the car and ac is off? Or should it psi be when it’s running like you said 90
degrees should be 110. Does that mean that I have too much pressure ? And have to release some? And hummerz , the thermostat should arrive tomorrow
 
Old Jul 13, 2020 | 07:22 PM
  #28  
hummerz's Avatar
Senior Member
Joined: Jul 2012
Posts: 8,999
From: C-Town
Default

Keep gauges connected, shut off engine and watch the gauges equalize(time how long it takes). Post your results, along with current ambient temp.
 
Old Jul 13, 2020 | 08:05 PM
  #29  
NFS's Avatar
NFS
Thread Starter
|
Senior Member
Joined: May 2016
Posts: 739
Default

Originally Posted by hummerz
Keep gauges connected, shut off engine and watch the gauges equalize(time how long it takes). Post your results, along with current ambient temp.
temperature is 96
took 5 mins for the needles to stop on both gauges
that’s the result in the pic


 
Old Jul 13, 2020 | 08:10 PM
  #30  
NFS's Avatar
NFS
Thread Starter
|
Senior Member
Joined: May 2016
Posts: 739
Default

Originally Posted by hummerz
Keep gauges connected, shut off engine and watch the gauges equalize(time how long it takes). Post your results, along with current ambient temp.
numbers are solid. So does that mean it’s charged? Or what should I do next?
 



All times are GMT -5. The time now is 01:49 AM.