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Trane Error Code Status LED off, comm LED on/counting: Idle (LEDs) (Furnace)

Updated · by Aurora Star Tech Inc.

Trane error code Status LED off, comm LED on/counting on a furnace means: Idle (LEDs). It is also called Trane diagnostic code Status LED off, comm LED on/counting.

Low severityFurnaceTrane S8V2

Homeowner? What Trane code Status LED off, comm LED on/counting means for you

Usually minor Your furnace is reporting: Idle (LEDs). This code is usually informational or minor. The safe checks below often clear it; call us if it keeps showing up.

Safe things you can check yourself

  • Check the thermostat: right mode (Heat or Cool), set a few degrees past room temperature, and fresh batteries if it uses them.
  • Make sure the unit has power: its on/off switch (often looks like a light switch near the unit) is ON and the breaker in the electrical panel is not tripped.
  • Make sure the furnace front door or panel is closed properly; many furnaces will not run with the door switch open.
  • Look at the air filter. If it is grey and clogged, replace it; a blocked filter causes many shutdowns.
  • Outside, make sure the intake and exhaust pipes or vent cap are not blocked by snow, ice, leaves or a nest.
  • Check that the gas valve next to the furnace is open (handle in line with the pipe). Do not force it.
  • Try one reset: turn the power off for 30 seconds, then back on. If the code comes back, stop resetting and call a technician.

Call (647) 657-2977Book a service call

Licensed technicians serving Vaughan, Toronto and the GTA.

What does Trane error code Status LED off, comm LED on/counting mean?

At idle the green status LED is off. In 24 V mode the amber communication LED stays on; in communicating mode it flashes a count of the devices on the network.

Applies to: S8V2 control board LEDs

Safety: Gas, electrical and refrigerant work must be done by a licensed technician. Turn off power and gas before servicing, never bypass a safety control, and always follow the manufacturer's manual for your exact model.

Trane models that use code Status LED off, comm LED on/counting

S8V2A040M3PCBS8V2A040M3PDS8V2B060M4PCBS8V2B060M4PDS8V2B080M4PCBS8V2B080M4PDS8V2C080M5PCBS8V2C080M5PDS8V2C100M5PCBS8V2C100M5PDS8V2D120M5PCBS8V2D120M5PD

Other Trane Furnace codes

CodeMeaning
MNRModel number recovery
rAtReturn air temperature readout
rSPReturn static pressure readout
runRun test mode
SAtSupply air temperature readout
Status LED 1 flashActive demand (LED)
tP1 to tP9Blower tap in use
uErVerification test mode

All Trane Furnace error codes →

Trane code Status LED off, comm LED on/counting: homeowner questions

What does Trane code Status LED off, comm LED on/counting mean?

Idle (LEDs). At idle the green status LED is off. In 24 V mode the amber communication LED stays on; in communicating mode it flashes a count of the devices on the network.

Is it safe to keep using my furnace with code Status LED off, comm LED on/counting?

Usually yes. Code Status LED off, comm LED on/counting is normally minor, but if it keeps coming back have it checked.

Can I reset Trane code Status LED off, comm LED on/counting myself?

You can try one reset (power off for 30 seconds, then on). If Trane code Status LED off, comm LED on/counting comes back, the cause is still there and a licensed technician should check it.

Who can fix Trane code Status LED off, comm LED on/counting near me?

Aurora Star Tech Inc. repairs Trane furnaces in Vaughan, Toronto and across the GTA. Call (647) 657-2977 or book a service call online.

Homeowner help: Furnace Not Turning On: What to Check · Furnace Blinking Light: What the Flash Codes Mean

Troubleshooting guides

Source: Trane S8V2 installation FNR-SVX003A-EN, Tables 38 and 39, p.61. Written in our own words as a summary; always check the original manual.

General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.

Emergency Furnace Repair

647-657-2977