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Manufacturer diagnostic code

Back to all TOSOT TM18D6MO codes

TOSOT TM18D6MO F0 troubleshooting

Insufficient refrigerant or refrigerant cut-off protection. Document the displayed code and operating conditions before scheduling service.

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What this code means

The manual identifies F0 as insufficient-refrigerant protection or refrigerant cut-off protection.

Code
F0
System area
Refrigerant circuit
Priority
Urgent
Applicable code set
TOSOT R32 Multi TM-D6MO error codes

Safe checks

  • Confirm the thermostat is on, set correctly, and calling for heating or cooling.
  • Check the air filter and visible return-air path for obvious airflow restrictions.
  • Record the displayed code or flash sequence before scheduling service.

First step

Record the code, avoid repeated reset attempts, and schedule GreenFlow service.

Frequently asked questions

What does F0 mean on a TOSOT TM18D6MO?

The manual identifies F0 as insufficient-refrigerant protection or refrigerant cut-off protection.

What should I safely check before scheduling service?

Use only the visible, non-invasive checks listed on this page. Do not open equipment panels.

When should GreenFlow handle this code?

Call GreenFlow if the code repeats, the equipment is locked out, heating or cooling is not restored, or the condition involves gas, ignition, pressure, wiring, a motor, or a control board.

Manufacturer source document