Error H6 on Daikin FTXB35C Air Conditioner | Causes & Fix

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• Source: Official Daikin service manual
• Reviewed by: Geo Technical Editorial
• Published: March 15, 2026
• Updated: March 15, 2026

Safety notice: Start with user-safe checks only. Do not open sealed refrigerant systems, inspect gas-train components, or work on energized high-voltage parts unless you are qualified to service this appliance.

Error H6 on Daikin : Indoor fan motor fault. Follow the troubleshooting steps below to diagnose and fix this air-conditioner issue. ## What Error Code H6 Means on a Daikin FTXB35C Error H6 on the Daikin FTXB35C indicates the indoor unit fan motor position (Hall sensor) is not detecting correct rotation. Daikin indoor fan motors use a Hall-effect sensor to monitor motor speed and position. If the Hall sensor signal is absent or erratic, the control board raises H6 and stops the fan motor. Causes include a failed Hall sensor, a failed indoor fan motor, or a wiring connector fault. When H6 appears, the Daikin air conditioner pauses normal operation to protect internal components from potential damage. Not every H6 fault requires a professional engineer — many are resolved through careful inspection and routine maintenance. Work through each diagnostic step below in sequence, starting with the simplest check, to identify the root cause efficiently before considering part replacement or arranging a service call. ## Symptoms - H6 on indoor display

• Indoor unit not producing airflow
• Motor hum with no fan rotation ## Common Causes - Indoor fan motor fault ## Tools You May Need - digital multimeter
• Torx T20 screwdriver ## Step-by-Step Repair Guide | Step | Action | Result | |------|--------|--------| | 1 | Isolate the AC. Remove the indoor unit front panel and filter. | Panel removed — continue to step 2 if the issue persists. | | 2 | Manually spin the indoor fan wheel — should spin freely with light resistance. | Fan spun — continue to step 3 if the issue persists. | | 3 | Locate the Hall sensor connector on the fan motor and reseat it. | Connector reseated — continue to step 4 if the issue persists. | | 4 | Test motor winding resistance: typically 10–50 Ω per phase. | Motor tested — continue to step 5 if the issue persists. | | 5 | Replace the indoor fan motor assembly if winding tests open-circuit or if Hall sensor is confirmed faulty. | Motor replaced — if the fault remains, contact a qualified technician. | ## Safety Precautions Isolate the AC before accessing the indoor fan motor. The fan capacitor in the indoor unit can retain a charge — wait 5 minutes after isolating before touching internal components. ## Estimated Repair Time and Difficulty Most air conditioner error code H6 faults can be assessed and addressed in 30–90 minutes using the steps above. The diagnostic process requires only basic tools: a multimeter and standard screwdrivers cover the majority of checks described here. If a replacement part is required, allow 1–5 working days for delivery. A trained technician with access to the correct diagnostic equipment will typically resolve this type of fault within a single service visit. ## When to Call a Technician Contact a Daikin authorised service technician if: the fault persists after following all the steps above; if PCB-level or refrigerant-circuit work is required; or if you are not comfortable working with electrical or mechanical components. When calling, have the full model number, the error code displayed, and a brief description of any sounds or symptoms you noticed before the fault appeared — this helps the technician prepare the correct parts and tools. ## Frequently Asked Questions Q: Can a foreign object cause H6? Yes — an object trapped in the fan wheel will stall the motor and trigger H6. Always check for obstructions before replacing the motor. Q: Is the indoor fan motor replaceable as a DIY repair? The indoor fan motor replacement requires removing the indoor unit from the wall. This is feasible for experienced DIYers but most Daikin dealers offer this as a relatively low-cost service call. Q: Does H6 affect the compressor? Yes — if the indoor fan does not run, the compressor will be protected and shut down (A5 or E3 will also appear) to prevent indoor coil freeze or heating coil overheat. ### Is it safe to keep using my Daikin with error H6? If error H6 does not indicate an immediate safety hazard such as a gas leak, electrical short, or water flooding, you can continue limited use while monitoring the appliance. However, running the air-conditioner with an active error code increases the risk of further damage. Address the underlying issue as soon as possible. For high-severity errors, disconnect the appliance and contact a qualified technician. ### How much does it cost to fix error H6 on a Daikin ? Repair costs for error H6 on the Daikin air-conditioner depend on the root cause. DIY fixes such as cleaning filters, resetting the unit, or reconnecting loose wires cost nothing beyond basic tools. If a component replacement is needed, parts and labor from a certified technician are the main expenses. Contact a Daikin-authorized service provider for an accurate estimate based on your specific situation. ### What does error code H6 mean on a Daikin air-conditioner? Error code H6 on Daikin air-conditioner models indicates Indoor fan motor fault. This error is detected by the appliance’s internal diagnostic system and displayed to alert the user that attention is needed. Refer to the troubleshooting steps above for guidance on resolving this issue. ### Is it safe to keep using my Daikin with error H6? If error H6 does not indicate an immediate safety hazard such as a gas leak, electrical short, or water flooding, you can continue limited use while monitoring the appliance. However, running the air-conditioner with an active error code increases the risk of further damage. Address the underlying issue as soon as possible. For high-severity errors, disconnect the appliance and contact a qualified technician. ### How much does it cost to fix error H6 on a Daikin ? Repair costs for error H6 on the Daikin air-conditioner depend on the root cause. DIY fixes such as cleaning filters, resetting the unit, or reconnecting loose wires cost nothing beyond basic tools. If a component replacement is needed, parts and labor from a certified technician are the main expenses. Contact a Daikin-authorized service provider for an accurate estimate based on your specific situation. ### What does error code H6 mean on a Daikin air-conditioner? Error code H6 on Daikin air-conditioner models indicates Indoor fan motor fault. This error is detected by the appliance’s internal diagnostic system and displayed to alert the user that attention is needed. Refer to the troubleshooting steps above for guidance on resolving this issue.