-
Recent Posts
Archives
- May 2017
- March 2016
- January 2016
- December 2015
- November 2015
- October 2015
- September 2015
- August 2015
- July 2015
- June 2015
- May 2015
- April 2015
- March 2015
- February 2015
- January 2015
- December 2014
- November 2014
- October 2014
- September 2014
- August 2014
- July 2014
- June 2014
- May 2014
- April 2014
- March 2014
- February 2014
- January 2014
- December 2013
- November 2013
- October 2013
- September 2013
- August 2013
- July 2013
- June 2013
- May 2013
- April 2013
- March 2013
- February 2013
- January 2013
- December 2012
- November 2012
- October 2012
- September 2012
- August 2012
- July 2012
- June 2012
- May 2012
- April 2012
- March 2012
- February 2012
- January 2012
- December 2011
- November 2011
- October 2011
- September 2011
- August 2011
- July 2011
- June 2011
- May 2011
- April 2011
Categories
Meta
-
Join 705 other subscribers
Monthly Archives: March 2012
Everything You Ever Wanted to Know About Capacitors
What is a capacitor and why are they needed in a system and how do I check them out? First of all, capacitors are only installed on single phase motors and compressors Three phase motors and compressors do not use … Continue reading
Posted in HVAC Tech Support
16 Comments
Discharge Temperature as part of a Diagnostic
One diagnostic reading that techs seldom take or look at is the Discharge Line Temperature. The discharge temperature of a compressor can usually tell the servicing technician what is happening inside an A/C system. The discharge of the compressor is the … Continue reading
Posted in HVAC Tech Support
5 Comments
Condenser Service Data
In the past few postings, we have been discussing the refrigerant cycle and some diagnostics. We have discussed how important looking at the whole system is to assuring a properly operating system. We have looked at troubleshooting using temperature and … Continue reading
Posted in HVAC Tech Support
1 Comment
RTU Filter Chart
In a previous posting, I have discussed the importance of proper air flow to assure proper operation of cooling and heating. In my last posting, I had pictures of a dirty blower and evaporator coil and discussed how this can affect the … Continue reading
Posted in HVAC Tech Support
Leave a comment
REFRIGERANT CYCLE – Part 2
Hopefully you have read my previous posting and understand how a simple refrigerant cycle operates. Now I will go into some diagnostics of the refrigerant side of a system. The first thing to remember is that refrigerant does not wear … Continue reading
Posted in HVAC Tech Support
Leave a comment
REFRIGERATION CYCLE (revisited) – Part 1
Here it is March already, spring is just around the corner, and summer will be upon us before we know it. With this in mind, it is a good time to think about air conditioning again and how it all … Continue reading
Posted in HVAC Tech Support
2 Comments
Run Away Heat in a Roof Top Unit
Every year about this time I receive calls about older packaged roof top units that the heat will not shut off even when the thermostat wires are removed. This occurs mostly on the Sunline roof top units and is usually a result of the … Continue reading
Posted in HVAC Tech Support
16 Comments