Trane Error Code CL1: Cooling, stage 1 (Furnace)
Trane error code CL1 on a furnace means: Cooling, stage 1. It is also called Trane diagnostic code CL1.
Homeowner? What Trane code CL1 means for you
Usually minor Your furnace is reporting: Cooling, stage 1. 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 CL1 mean?
Display for a first-stage cooling call. On the S8X2 the Y1-O jumper must stay in place for this reading; remove it for heat pumps or the display reads HP1.
Applies to: S8V2 and S8X2
Trane models that use code CL1
S8V2A040M3PCBS8V2A040M3PDS8V2B060M4PCBS8V2B060M4PDS8V2B080M4PCBS8V2B080M4PDS8V2C080M5PCBS8V2C080M5PDS8V2C100M5PCBS8V2C100M5PDS8V2D120M5PCBS8V2D120M5PDS8X2A040M3PSABS8X2B060M3PSABS8X2B060M4PSABS8X2B080M4PSABS8X2C080M5PSABS8X2C100M5PSABS8X2D120M5PSAB
Other Trane Furnace codes
All Trane Furnace error codes →
Trane code CL1: homeowner questions
What does Trane code CL1 mean?
Cooling, stage 1. Display for a first-stage cooling call. On the S8X2 the Y1-O jumper must stay in place for this reading; remove it for heat pumps or the display reads HP1.
Is it safe to keep using my furnace with code CL1?
Usually yes. Code CL1 is normally minor, but if it keeps coming back have it checked.
Can I reset Trane code CL1 myself?
You can try one reset (power off for 30 seconds, then on). If Trane code CL1 comes back, the cause is still there and a licensed technician should check it.
Who can fix Trane code CL1 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
- Blowing cold air All brands · Furnace
- No heat All brands · Furnace
- Short cycling All brands · Furnace
- Read or clear the last 6 faults (L6F menu) Trane · Furnace
- Reading and clearing fault history - Trane S-Series IFC Trane · Furnace
- Reset the control to factory defaults Trane · Furnace
- Run test mode (furnace) Trane · Furnace
Source: Trane S8V2 installation FNR-SVX003A-EN, Figure 73, p.58; Trane S8B1/S8X1/S8X2 installation 18-CE14D1-1A-EN, Sequence of Operation, 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.