Bosch Error Code LED off: Power supply failure (Air Handler)
Bosch error code LED off on a air handler means: Power supply failure. It is also called Bosch diagnostic code LED off.
Homeowner? What Bosch code LED off means for you
Call a technician Your air handler is reporting: Power supply failure. The air handler has locked out or cannot run properly. One reset is fine; if the code comes back, it needs a licensed technician to find the cause.
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.
- Look at the air filter. If it is grey and clogged, replace it; a blocked filter causes many shutdowns.
- 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 Bosch error code LED off mean?
The status LED is dark.
Applies to: Bosch IDS Plus/Premium BIVA20 R-454B air handlers (2-5 ton)
Common causes of Bosch code LED off
- No power to the air handler board
Bosch models that use code LED off
BIVA20-24BIVA20-36BIVA20-48BIVA20-60
Other Bosch Air Handler codes
All Bosch Air Handler error codes →
Bosch code LED off: homeowner questions
What does Bosch code LED off mean?
Power supply failure. The status LED is dark.
Is it safe to keep using my air handler with code LED off?
It depends on the cause. The air handler has locked out or cannot run properly. One reset is fine; if the code comes back, it needs a licensed technician to find the cause.
Can I reset Bosch code LED off myself?
You can try one reset (power off for 30 seconds, then on). If Bosch code LED off comes back, the cause is still there and a licensed technician should check it.
Who can fix Bosch code LED off near me?
Aurora Star Tech Inc. repairs Bosch air handlers in Vaughan, Toronto and across the GTA. Call (647) 657-2977 or book a service call online.
Source: Bosch IDS Plus/Premium air handler BIVA20 installation BTC 762003302 C (10.2024), section 13 LED Flashing Troubleshooting, p.49-50. 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.