Rx LED 1 steady flash Green receive LED single steady flash - no network found

What the control is telling you

The control is not finding a network.

Applies to: GMVC95/AMVC95 upflow and *CVC9 counterflow two-stage furnaces

Likely causes

• Broken or disconnected data wire(s)
• Furnace is wired as a legacy (24 V thermostat) system

Test and repair steps

1. Safety turn power off before working on the control or wiring.
2. Check the data 1 and data 2 wires and the terminal block connections.
3. Twist stranded wires together before putting them in the terminal block.
4. Confirm whether the furnace is meant to be legacy or communicating.
5. Check the data 1 / data 2 voltages.

Settings for these units

• Normal status displays (7-segment) · Goodman/Amana GM9S96/AM9S96
• Normal status displays (7-segment) · Goodman/Amana GM9S80/AM9S80
• Normal status displays (7-segment) · Goodman/Amana GM9C96/AM9C96
• Minimum recommended filter size · Goodman/Amana GM9C96/AM9C96

Models that show this code

10 models in Goodman/Amana *MVC95/*CVC9 two-stage ComfortNet

Other codes on the same units

• HI High-stage heat
• OP Normal - waiting for a call
• Red LED 1 flash Red communications LED 1 flash - communication failure
• Red LED 2 flashes Red communications LED 2 flashes - reset in progress
• Red LED off Red communications LED off - normal
• Rx LED off Green receive LED off - no power or communications error
• Rx LED on solid Green receive LED on solid - data lines miswired or shorted
• Rx LED rapid flash Green receive LED rapid flashing - normal network traffic