American Dryer Phase 6 Message: TEMP SENSOR FAIL CHECK TEMP SENSOR FUSE

What does American Dryer (ADC) TEMP SENSOR FAIL CHECK TEMP SENSOR FUSE mean?

The tumbler temperature sensor tells the Phase 6 OPL controller how hot the air in the drum is. If the sensor circuit opens, or the fuse that protects it opens, the controller shows TEMP SENSOR FAIL CHECK TEMP SENSOR FUSE. The message repeats with an audio indication for about 5 seconds every 30 seconds until the cause is fixed. The manual's action is to check the 1/8-amp fuse on the controller and the temperature sensor probe with its two wires. It lists open or shorted sensor wires, a failed probe, a blown 1/8-amp fuse and a failed controller as the causes. It also says the message clears by itself if the problem was an intermittent connection. Without temperature feedback the dryer cannot control heat safely. Operators see the beeping message and a dryer that does not heat normally.

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

• TEMP SENSOR FAIL CHECK TEMP SENSOR FUSE on the display
• Audio indication for about 5 seconds every 30 seconds
• Dryer does not heat normally
• Message may clear by itself if the connection was intermittent

Possible causes

Listed in American Dryer (ADC)'s documentation

• Open or shorted sensor wires
• Failed temperature sensor probe
• Blown 1/8-amp fuse
• Failed controller

Other likely causes — what usually sits behind TEMP SENSOR FAIL CHECK TEMP SENSOR FUSE on this control. A technician confirms which one it is before any part is replaced.

• Sensor wires chafed where they pass the tumbler or burner area
• Connector loose at the probe
• Fuse blown by a short in the sensor circuit

Safe checks before calling for service

How a technician diagnoses TEMP SENSOR FAIL CHECK TEMP SENSOR FUSE

1. Read the message and confirm TEMP SENSOR FAIL CHECK TEMP SENSOR FUSE.
2. Check the 1/8-amp fuse on the controller.
3. Check the temperature sensor probe and its two wires for open or shorted conditions.
4. Measure the probe against temperature.
5. Replace the fuse, probe or controller as the test shows.

How TEMP SENSOR FAIL CHECK TEMP SENSOR FUSE differs from similar codes

This message concerns the temperature sensor fuse; CHECK MAIN FUSE is the controller supply fuse.

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.22

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.