Dexter Coin Dryer Error Code F2: Temperature Sensor Open

What does Dexter error code F2 mean?

A Dexter T-series dryer control watches one thing above all: how hot the air is. It does this through a temperature probe that changes its electrical resistance with heat. The control applies a small voltage to the probe and measures what comes back. When the wire is broken, the plug has let go, or the probe has failed inside, nothing comes back, and the control sees an open circuit. It cannot tell whether the drum is cold or scorching, so it will not run the dryer in the normal way and shows F2. In a laundromat the first sign is usually a customer reporting that clothes came out damp after a full coin cycle, then an attendant spotting the code. The open circuit is the opposite of the shorted-sensor case, which the same control reports as F1, and the two need different tests. Because the drum shakes all day, a wire that is cracked inside its insulation can open and close as the dryer runs, so the code may seem to come and go before it settles in.

Affected models and control systems

Dexter T-30, T-50, T-80 and T-120 coin dryer controls. Other Dexter dryer controls number their messages differently.

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

• The control shows F2 where the cycle should be
• Clothes come out damp after a paid cycle
• The dryer does not heat or stops early
• The code clears after power-up and returns later

Possible causes

Listed in Dexter's documentation

• Temperature probe open inside
• Broken wire or loose plug at the probe
• Probe wire broken by drum vibration
• Control input misreading the probe as broken

Other likely causes — what usually sits behind error code F2 on this control. A technician confirms which one it is before any part is replaced.

• A probe lead that has been flexed at the same point for years until the copper strands separated
• A connector that has corroded or loosened because it sits in warm, lint-laden air

Safe checks before calling for service

How a technician diagnoses error code F2

1. Confirm F2 on the control and rule out an F1 or other message.
2. With power off and locked out, measure the probe resistance at room temperature and compare it with its rating.
3. Check the probe wiring and plug for breaks, flexing damage and corrosion.
4. Measure the control input with the probe disconnected to see whether the control reads the open correctly.
5. Replace the probe or harness only after the test, then run a full cycle and confirm drying heat.

How error code F2 differs from similar codes

F1 on the same control means the sensor is shorted; F2 means it is open. The tests and the usual causes differ.

Technical reference

Document

Dexter Common Dryer Troubleshooting and Error Codes (Dryer Error Codes, p. 6)

Maker documentation

Dexter owner support

Models / control

Dexter T-30, T-50, T-80 and T-120 coin dryer control

Section

Dryer Error Codes table (Symptom / Probable Cause / Suggested Remedy), p. 6

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.