AC Not Cooling - HVAC - DIY Chatroom Home Improvement Forum
Advertisement


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread
Display Modes
Old 06-10-2020, 10:45 AM   #1
Newbie
 
Join Date: Jun 2020
Posts: 1
Default

AC not Cooling


Changed from from r22 to 407c. Now the ac not cooling at all.The liquid line is not warm anymore.
Abe22 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 06-10-2020, 05:55 PM   #2
Member
 
surferdude2's Avatar
 
Join Date: Nov 2019
Location: Southern Illinois, USA
Posts: 2,946
Rewards Points: 898
Default

Re: AC not Cooling


Switching refrigerants can be problematic if not done properly. The oil used in older R22 systems is not compatible with 407C and can gum up the system and plug the metering device and evaporator.. That causes the system to pump down all the refrigerant in the low side to the high side and stop doing any further useful work.

It's so labor intensive and time consuming to get all the old petroleum based oil out of the system that it's usually not worth doing a conversion unless the compressor is being replaced. The replacement compressors have compatible oil in them.

Then it's also possible that you got some contaminant into the system that is causing the problem.
__________________
Ah, but I was so much older then...I'm younger than that now

Last edited by surferdude2; 06-10-2020 at 06:10 PM.
surferdude2 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 06-10-2020, 07:55 PM   #3
Member
 
Join Date: Nov 2014
Posts: 5,836
Rewards Points: 716
Default

Re: AC not Cooling


Please describe how you conducted the changeover.
Superheat and subcooling values?
Pressures and temperatures?
roughneck is online now   Reply With Quote
Sponsored Links
Advertisement
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Top of Page | View New Posts