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HVAC School - For Techs, By Techs

Dec 27, 2022

Jim Fultz with Emerson White-Rodgers returns to the podcast to talk about one HSI furnace control to rule them all, the 50M56X-843 Universal Single Stage Integrated Furnace Control.

The 50M56X does not come with wiring harnesses; the control comes with the plugs that the majority of manufacturers use, making it a versatile and user-friendly universal part. It also works with the White-Rodgers Connect app to help you configure the part with the burners. You can also do some basic configuration when it comes to the blower motor. With the 50M56X and Emerson White-Rodgers Connect app combination, you can quickly and accurately configure the control without wi-fi or a password. 

An igniter is included in the box with the 50M56X; the igniter must match the control. The control also comes with a three-digit display that communicates the microamp current from the flame sensor, meaning you don’t need to use a meter on the flame sensor. So, you can carry less truck stock and complete more calls with this universal part.

The device also has some potentially useful extra features. For example, the 50M56X stores error codes for 14 days, not permanently, to prevent causing confusion for future technicians. It also has a bus connector for the thermostat and a dehumidification terminal for thermostats with dehumidification capabilities.

Jim and Bryan also cover:

  • White-Rodgers universal vs. aftermarket vs. OEM parts
  • Blower speed and X13, ECM, and PSC motors
  • Near-field communication (NFC) capabilities 
  • Cross-referencing
  • Technology and ethical business
  • 50M56X warranty information
  • Integration with Sensi thermostats
  • WR Mobile App (available on Google Play and the App Store)


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