Dumbstruck by the new computer-controlled appliances? Let the Samurai enlighten you…

Click here to check out our structured, online appliance repair training courses for rookies and experienced techs.

FAQs | Repair Videos | Academy | Newsletter | Podcast | Contact

Stay connected with us...

Samurai on Facebook - become a fan today! Sign up for our free newsletter and keep up with all things Appliantology. Subscribe to our YouTube channel for lots of appliance repair tips and help! Follow the Samurai on Twitter and get timely morsels of Appliantological Wisdom! Subscribe to our MST Radio podcast to learn secrets of the trade.
Sign in to follow this  
Followers 0
LLAMBERT

AC just can't manage florida heat

4 posts in this topic

Heres the digits. air temp before the coil 75, past the coil 65. R22 pressures low side 74, high side 210. Had the ducts replaced. Insulation added is next step. unit about ten years old any thoughts?

Share this post


Link to post
Share on other sites

Need appliance parts? Call 877-803-7957 now!

75 PSI has it lugging.. With the house cool you oughta be around 68 PSI

Edited by applianceman18007260692

Share this post


Link to post
Share on other sites

thanks, I'll adjust it. house itself is 78-90 not cold enuf for swmbo.

Share this post


Link to post
Share on other sites
75 PSI has it lugging.
SAY WHAT?? HUH?? What you talkin' ' bout Willis???
R22 pressures low side 74, high side 210
Suction pressure of 74# is normal for a 75 degree air temp . No problems there.

Head pressure of 210 is low if it was hot outside, and I can guess it was really hot outside like in the 90's.

Here are some general rules of thumb for R-22.

At 95 degrees outside you will see somewhere around 275 # head pressure. maybe just a bit lower for a higher efficicancy unit.

Suction pressure often mimics the entering air temperature . If you have 75 degrees entering air temp , your suction pressure will likely be somewhere near 75# psi. Weird but often true.

You need to confirm what type of metering device you have. If you have a piston or cap tube metering device , you may have a " Partial No Pump " compressor. The symptoms are low head pressure (in relation to the outside temp),along with a higher than expected suction pressure ( in relation to the inside temp)

If you have a TXV (thermostaic expansion valve) , you may be simply low on refrigerant. With txv's you can have a high suction pressure when you are low on charge. One indicator of low charge is low head pressure . I would expect to see higher pressure than 210 when it is very warm outside .

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0