Tag Archives: digital meter

Compressor Electrical Diagnostics — Revisited

In reviewing posts from time to time that have the most views i feel it is a good thing to bring back a post that was previously written.  The following was originally written back in 2011 but there have been … Continue reading

Posted in HVAC Tech Support | Tagged , , , , , , , , , , , , , , , , , | Leave a comment

Heating Season — Flame Rectification

Today’s units react to unsafe conditions in less than a second. This is accomplished through the use of “computerized control modules” and a flame sensing control system known as flame rectification. The safety used in today’s furnaces that accomplishes flame rectification is … Continue reading

Posted in HVAC Tech Support | Tagged , , , , , , , , , , , | 1 Comment

Hot Surface Igniters

To start this post, let’s answer the question, What is a Hot Surface Igniter? The hot surface igniter, or glow bar as it is commonly referred to, is a device that lights the burners in your furnace. Just as you used … Continue reading

Posted in HVAC Tech Support | Tagged , , , , , , , , , , , , , , , | 1 Comment

“Can’t See The Forest for The Trees”

Of course, the title of this post is a very old saying but I felt is was appropriate here.  Why did I choose this as the title — because the meaning is: If you can’t see the forest for the … Continue reading

Posted in Commentary, HVAC Tech Support | Tagged , , , , , , , , , , , , , , , , | 2 Comments

A Real Learning Experience – Electrical Diagnostics

The other day, I had a phone call with a service tech on a rooftop unit.  He had made a diagnosis of a bad motor and went and got a new motor.  He put the new motor in and “it only runs … Continue reading

Posted in HVAC Tech Support | Tagged , , , , , , , , , , , | 5 Comments

3 Bad Boards in 3 Months?

What do you think the odds are of a new roof top unit going through 3 control boards in just 3 months since the unit was installed? And, if this truly was the case, don’t you think some one would … Continue reading

Posted in HVAC Tech Support | Tagged , , , , , , , , , , , , , , , | 1 Comment

Trust your meter?

So, how many of you “trust” your meters?  You’re probably asking yourself, “what is he talking about?”  So I’ll try to explain my question with some examples. The other day, I had a contractor call who was looking to confirm … Continue reading

Posted in Commentary, HVAC Tech Support | Tagged , , , , , , , , , , , , | 4 Comments