Monthly Archives: October 2012

X-13 Motors — What Are They?

Since posting the information on ECM motors and standard motors, I have had a number of request for information on the X-13 motors. Before we get into troubleshooting, I think it is important to understand what an X-13 motor is … Continue reading

Posted in HVAC Tech Support | 27 Comments

Furnace Pressure Switches

As we start the heating season, we already have been getting questions about the vent pressure switches in furnaces.  I usually hear something like this, “I’m getting a flash code 3 – open pressure switch.  I jump the switch and the … Continue reading

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New D.O.E . Rules — Part 3 (venting)

In my last 2 posts, we discussed condensate in 90+% efficient furnaces and the D.O.E. Rules that will go into effect May 1, 2013 for all furnaces.  We discussed pH of the condensate and the possible need for acid neutralizer … Continue reading

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Furnace Condensate & New D.O.E. Rules – Part 2

In my last post, I addressed the question of the pH of the condensate that comes out of 90+% furnaces.  Since that post has come out, I have been asked the question, How much condensate will be produced by a … Continue reading

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Updated Index of Posts

Since July, when I last posted the index, there have been a lot of new posts.  Here is a quick link to all my post listed alphabetically.  “Twinning” Furnaces 3-phase Phase Monitors 90+ Venting to 150 Feet? 90+% Furnace Venting A Little Test A Visit from … Continue reading

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Furnace Condensate & New D.O.E. Rules

Recently, I have had questions about the “acidity” of the condensate from 90+% efficient furnaces.  These questions have come from architects, engineers, city inspectors and sales people.  As you may or may not be aware, as of May 1,2013 — less … Continue reading

Posted in Commentary | 7 Comments

Basic Motor Diagnostics

A few posts ago, I presented information on how to diagnose ECM motors. Even though these are becoming more popular, there are still a lot of “standard” motors out there.  So, in this post, I want to give you some … Continue reading

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