Tag Archives: refrigerants

I must be doing something right!

Back in April 2011, I started writing on this blog site as a way to help my local contractors and dealers. Most of the posts were based on issues these persons were experiencing and this was a good forum to … Continue reading

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Proper Air Conditioning Sizing

I recently received this question from a homeowner who came upon the blog site: Mike I read some of your articles online and am asking for your opinion. I replaced my antiquated system with a new system. I have a 1250 … Continue reading

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THANK YOU!

A couple of milestones were hit recently  — in April, this blog turned 4 years old. It was started in April 2011. Even more amazing is, as of this writing, there have been 400,312 views of the various articles from … Continue reading

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Indoor Coil Leaks

With A/C season officially here, I have been asked to address an issue that has been around our industry for a long time now and that is indoor coil leaks also known as formicary corrosion. Indoor coil corrosion failures are an … Continue reading

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Maintaining Equipment Efficiency

I participate in a blog called HVAC SERVICE SELLING  and this was posted on the site by Robert Baker who does commercial heating and cooling.  I felt this tied in nicely with my “Spring Cleaning” series of posts and thought I would pass … Continue reading

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SUPER-HEAT as a Diagnostic

Whether you are working on a 1½ ton unit or a 50-ton unit, the principles of the refrigeration cycle is the same.  The most important thing to remember about compressors is that they are VAPOR PUMPS. Compressors do not like … Continue reading

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Proper Charging with Sub-cooling Revisited

Sub-cooling seems to be a great mystery to a lot of service techs in the field yet, any unit with a TXV type metering device, should be charged by sub-cooling instead of super-heat. Since a TXV has a pre-set super-heat … Continue reading

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Spring Cleaning — Completing the Maintenance

In this last part of my Series on “Spring Cleaning” (maintenance), we will now actually start the unit and do some checks with the unit operating.  You need to remember, SAFETY IS ALWAYS FIRST  when working on any live equipment. Make … Continue reading

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Spring Cleaning — Part 2

It has been a week since my last post, Day Light Saving started, and the temperature has been getting warmer.  At least around Chicago, the temps have managed to get into the 50’s.  Now, this temperature is still not where … Continue reading

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Spring Cleaning — Part 1

Well, here it is March 3 which places us in meteorological SPRING. (And, for those in the U.S., don’t forget that Day-light Savings Time starts THIS WEEKEND ). I know that those of us up north and out east are still dealing with … Continue reading

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