UNCONFORMED Review (Quick Tip)
I just finished reading the book Unconformed, by Bryan Orr, from HVAC School. I invested about 5 hours spread over three days and let me...
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Quick Tips
Aug 4, 20231 min read
The Directional Flow of Refrigerant in a Heat Pump During AC Mode (Quick Tip)
(This image is courtesy of our friend JD Kelly @student_of_hvac) In this refrigerant flow diagram, we see a simplistic piping arrangement...
4,049 views0 comments
Aug 4, 20232 min read
Simple Low Voltage Thermostat Wiring to Control an Indoor Blower Motor (Quick Tip)
(This image is courtesy of our friend JD Kelly @student_of_hvac) This drawing shows how a low voltage wiring circuit can control a high...
10,850 views0 comments
Aug 6, 20201 min read
Why Do Some Evap Coils Leak While Others Do Not? (Quick Tip)
Why do older coils seem to last a long time but ones that are only 10 or 15 years old leak? Energy transfer efficiency was not as much of...
2,767 views8 comments
Jun 29, 20201 min read
Can I measure a Negative Subcooling When Checking the Charge? (Quick Tip)
The answer is no because the refrigerant rejects heat in the condenser so the pressure and temperature of the refrigerant should lower....
3,996 views1 comment
May 3, 20202 min read
Is a Triple Evacuation Necessary for a Deep Vacuum?
Do you have to do a triple evacuation if you can achieve a deep vacuum by only doing a single evacuation? Remember that the target vacuum...
2,332 views0 comments
May 1, 20201 min read
Measuring Negative Superheat on an Air Conditioner? (Quick Tips)
Can you Measure Negative Superheat on an air conditioner when checking the charge? The Answer is NO! Time to check your gauges and temp...
2,851 views1 comment
Apr 30, 20202 min read
How to Tell if a TXV Has Lost Part of its Bulb Charge! (Quick Tip)
How do you tell if a TXV lost part of its bulb charge? If you are measuring a correct/high subcooling along with a high superheat and a...
10,227 views2 comments
Apr 28, 20201 min read
Connect Your Gauges Sooner Than Later! (Quick Tip)
When checking the refrigerant charge of a running HVACR system, remember to attach your refrigerant hose to the vapor port right away....
1,977 views0 comments
Apr 28, 20201 min read
Free Shrader Valve Refrigerant Leak Tester (Quick Tip)
Make a Quick Free Refrigerant Leak Tester for the Schrader Valve (Valve Core) at the Access Port. Drill an 1/8” hole in the end of an...
2,570 views1 comment
Apr 13, 20201 min read
An Additional Valve Core Removal Tool for your Vacuum Gauge! (Quick Tip)
Use an additional valve core removal tool in your vacuum setup to valve off and protect the vacuum gauge sensor from oil contamination...
2,394 views0 comments
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