Monthly Archives: September 2012

Continuing with my series on troubleshooting packaged units prior to the introduction of Simplicity Controls with diagnostic flash codes, the older Sunline units used a Johnson G67, G770, and/or G775 ignition control.  There were no diagnostic flash codes or lights on this control … Continue reading →

In my last 2 posts, we discussed how to use your meters to check out ECM motors, modules, and control boards.  These checks involved taking voltage reading and resistance reading on the various components to see where the problem occurred … Continue reading →

In my previous post, we covered checking the power and communication to the ECM motor/module.  If all of that was correct, now we need to see if the problem is in the motor, or in the module. Motor Tests These tests … Continue reading →

If you read my last post on “What is an ECM Motor?” you should have a basic understanding of how an ECM motor works.  As promised, we will now talk about how to troubleshoot equipment with ECM motors.  This will … Continue reading →

Today’s higher efficiency equipment, both furnaces and A/C, are now using new higher efficiency motors to reduce the total electrical consumption of the system thus raising the efficiency. They also help with the efficiency by maintaining the proper air flow (CFM) … Continue reading →