Search found 31 matches

by robmaxfli
Sun Jul 12, 2020 6:53 pm
Forum: Automotive Air Conditioning Forum
Topic: 99 Maxima poor cooling *SOLVED*
Replies: 18
Views: 2646

Re: 99 Maxima poor cooling

To verify that there is a blend door type issue , you could pull off the 2 heater hoses from the heater core, buy a connector/bridge to join those 2 hoses together. I just did this and it proved to be a blend door issue. This will take the heat out of the heater core so you can get a heat-free readi...
by robmaxfli
Sat Jul 11, 2020 3:45 pm
Forum: Automotive Air Conditioning Forum
Topic: 99 Maxima poor cooling *SOLVED*
Replies: 18
Views: 2646

Re: 99 Maxima poor cooling

H – too low L – too high Low refrigerant level or failing compressor With the gauges connected, rev the engine to 2000 RPM and watch what the pressures in the AC system do. Do they move closer together (high side gets lower while low side gets higher) or do they move away from each other? If they mo...
by robmaxfli
Sat Jul 11, 2020 1:43 pm
Forum: Automotive Air Conditioning Forum
Topic: 99 Maxima poor cooling *SOLVED*
Replies: 18
Views: 2646

Re: 99 Maxima poor cooling

Your Low side too high and your High side is too low. Is the fan working at the condenser and is the condenser relatively clean - not clogged by debris? Yes - you pull the vacuum first and then charge.
by robmaxfli
Fri Jul 10, 2020 5:13 pm
Forum: Automotive Air Conditioning Forum
Topic: 2017 Tahoe - Recharging AC Issue
Replies: 8
Views: 918

Re: 2017 Tahoe - Recharging AC Issue

I went and bought a cheap $20 digital scale from Harbor Freight a few days ago because I was always guessing/hoping that I had got the right amount in. The pros charge by weight scales to be 100% accurate on the charge. What happened when you tried to add more refridgerant? Did the pressures go up? ...
by robmaxfli
Thu Jul 09, 2020 6:22 pm
Forum: Automotive Air Conditioning Forum
Topic: 2017 Tahoe - Recharging AC Issue
Replies: 8
Views: 918

Re: 2017 Tahoe - Recharging AC Issue

Would the high side coupler being messed up cause the system to not ingest Freon after taking in one 8oz can and reflect higher than normal low side psi? To answer your question, No , you don't even have to have the high side connected to the gauges when charging (although it is advised). Those coup...
by robmaxfli
Thu Jul 09, 2020 1:24 pm
Forum: Automotive Air Conditioning Forum
Topic: 2014 GMC Sierra not cooling well
Replies: 10
Views: 1268

Re: 2014 GMC Sierra not cooling well

You might try an internet search on the blend door on the Sierra. Common problem. With the heater by-passed for the summer, your defroster will not work. I've done lots of searching for blend door on the Sierra and the common problem that people have is for those with dual zone climate. For example...
by robmaxfli
Thu Jul 09, 2020 10:36 am
Forum: Automotive Air Conditioning Forum
Topic: 2014 GMC Sierra not cooling well
Replies: 10
Views: 1268

Re: 2014 GMC Sierra not cooling well

just in case this helps anyone, I was able to achieve 43 degrees out the vents after i bypassed the heater core. its 90 degrees outside here. I'm thinking about leaving it this way for the summer :)
by robmaxfli
Wed Jul 08, 2020 2:30 pm
Forum: Automotive Air Conditioning Forum
Topic: 2014 GMC Sierra not cooling well
Replies: 10
Views: 1268

Re: 2014 GMC Sierra not cooling well

I'm not familiar with a heater core reheat. But I will bypass the core tonight to see if it improves the AC.
thanks
by robmaxfli
Tue Jul 07, 2020 7:56 pm
Forum: Automotive Air Conditioning Forum
Topic: 2014 GMC Sierra not cooling well
Replies: 10
Views: 1268

2014 GMC Sierra not cooling well

Howdy, As the title states I am not getting nice cold air out of the vents. I measured vent temps and they are almost 70 degrees. On a 93 Degree day here in Texas. Today I decided to evacuate the system, pull a vacuum that held , and then recharge to the correct amount of 21oz. Vent temps are still ...
by robmaxfli
Sat Aug 12, 2017 9:19 am
Forum: Automotive Air Conditioning Forum
Topic: R12 Charging Problem
Replies: 3
Views: 3650

Re: R12 Charging Problem

Yes.... :twisted:

thank you

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