American Dryer Phase 6 Message: bURNER SAFETY FAIL
BURNER SAFETY FAIL means the burner hi-limit switch opened. The dryer runs with no heat for 3 minutes or until the temperature drops below 100 F, then shuts down. Check the lint screen and exhaust, and have the burner hi-limit circuit checked.
High: a burner safety limit has opened, so the dryer must not be used until the cause is found.
- Code
- BURNER SAFETY FAIL
- Maker
- American Dryer (ADC)
- Equipment
- Dryers
- Applies to
- American Dryer ML-175 and ML-190 with the Phase 6 OPL microprocessor controller (Phase 7 is a separate section of the same manual)
What does American Dryer (ADC) BURNER SAFETY FAIL mean?
The burner hi-limit switch is a safety thermostat at the burner that opens when the temperature gets too high. The Phase 6 OPL controller watches it, and when it opens, the display shows bURNER SAFETY FAIL. The controller then removes the heat. The dryer keeps tumbling with no heat for 3 minutes or until the temperature drops below 100 F, and then it shuts down, which cools the load and the cabinet safely. The manual's action is to check the burner hi-limit circuit, and it refers to the cause list for the burner hi-limit tripping, which names exhaust restriction, make-up air and the lint screen. So the message often points at airflow, not at the switch. A clogged lint screen or a blocked exhaust duct holds heat at the burner until the limit opens. Operators see the dryer lose heat in the middle of a cycle and finish with a damp load.
Affected models and control systems
American Dryer ML-175 and ML-190 with the Phase 6 OPL microprocessor controller. Phase 7 is a separate section of the same manual and is not covered here.
Code numbers and their meaning can change between control generations. We match the full model and control before acting on a code.
What you may notice
- BURNER SAFETY FAIL on the display
- Dryer loses heat mid-cycle
- Dryer tumbles without heat, then shuts down
- Load still damp
Possible causes
Listed in American Dryer (ADC)'s documentation
- Burner hi-limit switch open
Other likely causes — what usually sits behind BURNER SAFETY FAIL on this control. A technician confirms which one it is before any part is replaced.
- Lint screen packed with lint
- Exhaust duct restricted or crushed
- Make-up air opening blocked in the laundry room
- Burner hi-limit switch aged and tripping early
Safe checks before calling for service
- Let the dryer cool, then clean the lint screen.
- Check that nothing blocks the exhaust outlet and the make-up air opening.
- Restart a short cycle with a smaller load.
- If the message returns, note how long the dryer ran before it appeared, then call us.
How a technician diagnoses BURNER SAFETY FAIL
- Read the message and confirm bURNER SAFETY FAIL.
- Check the lint screen, exhaust and make-up air.
- Check the burner hi-limit circuit and switch.
- Test the switch for continuity when cool.
- Replace the switch only if it opens below its rating.
- Burner and limit circuits on a gas dryer are checked by a technician who works on gas appliances.
- Exhaust restriction needs a duct survey with proper instruments.
- Resetting or bypassing a limit is not acceptable.
How BURNER SAFETY FAIL differs from similar codes
BURNER SAFETY FAIL is the burner hi-limit; dRUM SAFETY FAIL is the tumbler hi-limit.
Technical reference
- Document
- ML-175 / ML-190 Service Manual, Phase 6 / Phase 7 Microprocessor Controls (American Dryer Corporation)
- Maker documentation
- American Dryer (ADC) owner support
- Edition
- ADC Part No. 450431-3
- Models / control
- American Dryer ML-175 and ML-190 with the Phase 6 OPL microprocessor controller (Phase 7 is a separate section of the same manual)
- Section
- Phase 6 OPL System Diagnostics, Diagnostic (L.E.D. Display) Failure Codes, printed p.21
- Checked
- October 2026
We use the maker's document to read the code and do not reproduce it. Always confirm the complete model and control before applying these steps.
Related American Dryer (ADC) dryer error codes
What happens after the message?
The dryer runs with no heat for 3 minutes or until below 100 F, then shuts down.
Is the switch bad?
Often the airflow is the reason, per the manual's cause list.
Can I keep drying?
Not until the lint and exhaust are checked.
Need help with American Dryer (ADC) BURNER SAFETY FAIL?
A technician confirms the cause on site and gives you the price in writing before any work starts.