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Fujitsu Air Conditioner 35 Error Code

MANUAL AUTO button stuck. What it means, which models show it, and how to clear it, easiest fix first.

FujitsuAll Fujitsu air conditioner codes

35
Moderate DIY

The MANUAL AUTO button on the indoor unit has registered as pressed for about a minute or longer. It may be physically stuck, held in by something resting against it, or faulty.

Compatible models

Fujitsu doesn't publish a model list for this code; it appears on Fujitsu air conditioners with a digital display. Check your owner's manual.

Also shown as

Lamp pattern: on models that show faults with the indicator lamps, Fujitsu's tables for many current wall-mounted (RL/RLS/RLX, LZAH), compact ducted (RGLX) and RLF multi-zone units show this code as the Operation lamp flashing 3 times and the Timer lamp flashing 5 times, with the Economy lamp marked "continuous". Other Fujitsu units, such as universal-mount and ceiling-suspended models, use different lamps. A wired controller shows the code as a number. Listed as 35.1 in Fujitsu's FGLair app table. Fujitsu's older code set (for example older 9CQ/9RLQ/12CQ wall units, RMLQ-series multi-zone heads and some RCLX ceiling cassettes) uses different numbers for many faults, so always check the manual for your model.

Difficulty

Start with the safe checks below; a worn part may need replacing.

Safety first: unplug the air conditioner (or switch off its breaker) before touching filters, hoses or panels. If you smell burning or gas, or see water near the outlet, stop and call a professional.

How to fix Fujitsu 35

  1. Free the button

    Find the MANUAL AUTO button on the indoor unit (usually under the front panel's edge or behind its flap). Make sure nothing is pressing on it and that it springs back after you press and release it once. Don't remove covers or panels to get at it.

  2. Reset the power at the breaker

    Switch the system off with the remote, then turn off its circuit breaker in your home's main panel. Wait about 5 minutes, switch the breaker back on and restart the unit. If the code returns within a few minutes, write it down for the technician.

When to call a technician

If the button is free and the code remains, the button switch or indoor board needs replacing by a technician.

Parts linked to 35

These are the parts most often behind this code. Tap one to see what it does and the signs it is failing.

Order parts by your full model number so they fit.

Frequently asked questions

What does 35 mean on a Fujitsu air conditioner?

The MANUAL AUTO button on the indoor unit has registered as pressed for about a minute or longer. It may be physically stuck, held in by something resting against it, or faulty.

Which Fujitsu models show the 35 code?

Fujitsu doesn't publish a model list for this code; it appears on Fujitsu air conditioners with a digital display. Check your owner's manual.

Can I fix Fujitsu 35 myself?

Often. The first steps above are safe checks a homeowner can do. If they don't clear 35, the cause is likely a worn part that needs replacing.

What if 35 keeps coming back?

A code that returns after a reset and the checks above usually means a part is wearing out. Note when 35 appears (which cycle, how often) and have your model number ready; it helps a technician bring the right part on the first visit.

Other Fujitsu air conditioner codes

Last reviewed 2026-10-19. Codes and steps can vary by model; check your owner's manual.

Sources we checked