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Nortron ECM Serirs - User Manual

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INSTALLATION AND USER MANUAL
ECM SERIES ELECTRIC FURNACE
MODELS: 21ECM10, 21ECM15, 21ECM18, 21ECM20 AND 21ECM23
IMPORTANT: READ AND SAVE THESE INSTRUCTIONS.
NORTRON; Sherbrooke, Quebec www.dettson.ca 1-800-567-2733
2019-10-10 X40253B

Questions and Answers

  • L
    Logan RothAug 15, 2025
    What to do if the breaker on front panel trips in Nortron ECM Serirs?
    • T
      Tony JacksonAug 15, 2025
      If the breaker on the front panel of your Nortron Furnace trips, it indicates an overcurrent on the heating element. Try resetting the breaker. If the problem continues, it is recommended to call an electrician.
  • A
    alexander46Aug 18, 2025
    Why Nortron ECM Serirs is not providing enough heat?
    • J
      Julie TravisAug 18, 2025
      If your Nortron Furnace isn't providing enough heat, check the following: Ensure the elements or relays are functioning correctly. Verify the SEASON SELECT switch is not set to the MILD position. Check for obstructions in the ductwork or dirty filters restricting airflow, which may cause safety limits to open. Inspect for a defective or incorrectly wired two-stage or outdoor thermostat. Ensure there are enough cold air returns in the house.
  • B
    Benjamin AveryAug 21, 2025
    What to do if Nortron ECM Serirs will not turn off?
    • A
      April BuchananAug 21, 2025
      If your Nortron Furnace won't turn off, first turn the thermostat to its lowest setting. If the furnace continues to run even when there is no 24V between terminals C and W, then the thermostat has opened properly, and the problem is within the furnace itself. Otherwise, the issue lies with the thermostat or its wiring.
  • J
    Justin LaraAug 25, 2025
    How to troubleshoot Nortron Furnace if it will not start?
    • B
      Brian ForbesAug 25, 2025
      If your Nortron Furnace will not start, turn the thermostat to its highest setting. If 24V is present between terminals C and W, the thermostat has closed, and the fault is in the furnace. Otherwise, the thermostat or its connecting wiring is the problem.
  • C
    Crystal DavisAug 27, 2025
    Why does the thermal cut-out open in Nortron ECM Serirs Furnace?
    • T
      Toni PerezAug 27, 2025
      If the thermal cut-out opens in your Nortron Furnace, it means airflow is reduced because of blocked ductwork or very dirty filters.
  • M
    Miguel MorrisonAug 30, 2025
    What to check if Nortron ECM Serirs will not turn on?
    • D
      Debbie JonesAug 30, 2025
      The following components could be the cause if your Nortron Furnace will not turn on: the thermostat, an open circuit breaker or fuse, the motor or capacitor, the SPEED SELECTOR switch (open contact), the electronic control, or the transformer.
  • K
    kristi84Sep 2, 2025
    What causes elements to be on, but motor not running in Nortron ECM Serirs?
    • B
      bwangSep 2, 2025
      If the elements are on, but the motor does not run in your Nortron Furnace, check the motor or capacitor, the SPEED SELECTOR switch (for an open contact), and the electronic control.
  • S
    Sabrina CordovaSep 5, 2025
    Why does the motor run continuously in Nortron ECM Serirs Furnace?
    • C
      Connie HarrisSep 5, 2025
      If the motor in your Nortron Furnace runs continuously, check if the thermostat wires are incorrectly attached to the furnace.
  • V
    Victoria KelleySep 8, 2025
    What causes motor to cycle on and off in Nortron ECM Serirs?
    • Y
      yhaynesSep 8, 2025
      If the motor in your Nortron Furnace is going on and off in short (or long) cycles, the heat anticipator in the thermostat may be incorrectly set or defective.
  • K
    kelly02Sep 12, 2025
    Why the thermostat must be set much higher than desired temperature in Nortron ECM Serirs Furnace?
    • J
      Janice HernandezSep 12, 2025
      If the thermostat must be set much higher (or lower) than the desired house temperature in your Nortron Furnace, it could be that the thermostat is not leveled or is out of calibration.

Summary

Dimensions

General Requirements and Specifications

Operating Options

Breakers

Installation Notes

Cold Air Return

Details on attaching the duct to the furnace for air return.

Electrical Wiring - Power Supply

Requirements for power supply wiring and ground conductor connection.

Connecting and Adjusting the Low Voltage Thermostat

Steps for connecting and setting up the low voltage thermostat.

Use in Mobile Homes

Using Optional Equipment

Two-Stage or Outdoor Thermostat

How to use two-stage or outdoor thermostats with the furnace.

Air Conditioning

Guidelines for adding air conditioning to the furnace system.

Electronic Air Cleaners and;or Powered Furnace Humidifiers

Details on operating 120V accessories with the furnace.

Interlock Connection

Connecting the furnace with other devices like wood burning furnaces.

Wiring Diagrams

Service Parts

Maintenance

Troubleshooting

Warranty

Nortron ECM Serirs Specifications

General IconGeneral
BrandNortron
ModelECM Serirs
CategoryFurnace
LanguageEnglish

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