To Next PageTo Next PageHow to fix low flame sense current on Emerson White-Rodgers 21D83M-843?
Low flame sense current is often due to carbon deposits on the flame sensor, a poorly grounded furnace, or a misaligned flame sense probe. You can clean carbon deposits using emery cloth. Also, check or improve the furnace and module ground. Ensure the sensor is located in or very near the flame as specified by the appliance manufacturer.
What to do if my Emerson Microcontroller shows a module internal fault condition?
An internal fault condition in the module can be due to module contacts for the gas valve not operating or a processor fault. Try resetting the control. If the condition continues, replace the module.
What to do if Emerson Microcontrollers flame sensed with gas valve de-energized?
If you're experiencing a flame sensed even when the gas valve is de-energized, you should verify that the gas is operating and shutting down properly. The flame in the burner assembly should extinguish promptly at the end of each cycle. Check the orifices and gas pressure.
What to do if pressure switch stuck closed or open in Emerson White-Rodgers 21D83M-843?
If the pressure switch is stuck closed, check the switch function and verify the inducer is turning off. If the pressure switch is stuck open, check the pressure switch function and tubing. Verify the inducer is turning on and pulling sufficient vacuum to engage the switch.
General| Voltage | 24 VAC |
|---|---|
| Brand | Emerson White-Rodgers |
| Model | 21D83M-843 |
| Operating Voltage | 24 VAC |
| Frequency | 50/60 Hz |
| Application | Furnace control systems |
| Category | Furnace Control |
| Operating Temperature | -40°C to 79°C |
| Humidity | 5% to 95% relative humidity (non-condensing) |
Crucial safety warnings and cautions for installation and operation to prevent injury or damage.
Details electrical ratings, humidity range, mounting, and operating temperature of the control.
Outlines the timing parameters for various operational events like pre-purge, ignition, and fan delays.
Step-by-step instructions for replacing Lennox, White-Rodgers, and other specified control models.
Detailed guide for replacing a wider range of Lennox, White-Rodgers, and other specified control models.
Instructions for replacing specific models, configuring option switches, and understanding heat mode operation.
Details the control's function in cool mode and manual fan operation.
Explains system lockout conditions, reset procedures, and diagnostic LED indicators.
A table correlating LED status to error conditions and providing troubleshooting advice.
