A Mitsubishi AC timer light (or operation indicator lamp) that blinks or flashes six times is signaling an issue with the thermistor (or sensor) in the outdoor unit. A short or open circuit may be present in the outdoor thermistor or there’s an electrical fault in its contact point on the PCB control terminal. The aircon’s cooling performance is affected by a faulty thermistor, leading to increased energy consumption, a pressing issue especially for Singaporeans who have judiciously followed NEA’s suggested interior design tips for optimal home cooling.
The Mitsubishi air conditioning unit, depending on which model you are using, normally has one indoor thermistor in the fan coil unit and at least two outdoor thermistors (which include the gas thermistor and heat exchanger thermistor) in the condenser unit. The six-blink code on the Mitsubishi AC timer light is signaling for a malfunction in the latter outdoor thermistors.
💡 Need help with blinking lights?
Mitsubishi aircon light blinking (full guide)
Table of Contents
- Meaning of Six Blinks or Flashes on the Mitsubishi AC Timer Light
- Understanding the Mitsubishi Indicator Lamp and Identifying the Error
- Troubleshooting the Error Code Indicated by 6 Blinks on the Mitsubishi AC Timer Light
- Estimated Cost of Repairing the Error Indicated by 6 Blinks on the Mitsubishi AC Timer Light
- Conclusion
The Mitsubishi air conditioning unit signals an error code and the error’s likeliest source via blinks or flashes on the AC timer light. If an error is detected in the system and its most probable source identified, the indoor fan motor will automatically stop. Then the upper or left operation indicator lamp will blink. The number of blinks corresponds to a specific error code. But before you start diagnosing the problem, check first if the horizontal vane of your indoor aircon is secure. If the flaps are loose or incorrectly inserted, they will also make the indicator lamp blink.
To signal an error code, the upper or left operation indicator lamp of the Mitsubishi indoor air conditioning unit will start to blink. To get the error code, start counting the number of blinks between the delays. The interval between the blinks is quick and lasts for 0.5 seconds, while the interval between the blinking pattern is 2.5 seconds.
Troubleshooting the Mitsubishi AC error code of six blinks on the timer light involves shutting down the air conditioning unit, unplugging it from the power outlet, and checking the outdoor unit, especially the outer thermistors, for dirt, damage, and loose or severed connections. The outdoor thermistor of the Mitsubishi air conditioning unit normally looks like a black wire with a copper sensor head, and it’s easy to spot if you can access the internal parts of the outdoor AC unit. Once you’ve completed the troubleshooting, plug the AC back in, switch it on, and hopefully the blinking has stopped. If the error hasn’t cleared yet, it’s time to seek professional help and get your Mitsubishi air conditioning unit back up and running smoothly again.
Silverback Aircon has a collection of refurbished Mitsubishi aircon spare parts on hand. Moreover, we can replace any defective outdoor thermistor. As for damaged outdoor PCBs on Mitsubishi AC models, Silverback Aircon has adopted a cost-effective practice for repairing them. If one of your outdoor PCBs is malfunctioning, we will go the extra mile and replace the circuit box containing the full set of Mitsubishi PCBs that go with your condenser model. For the Mitsubishi condenser MXY3A28VA, three types of PCBs (control board, power board, and noise filter) exist. For the Mitsubishi condenser model MSYGE10VA, only two PCBs (the control board and power board) are used.
The tabulated summary below shows the cost of replacing the potentially damaged parts involved in this particular Mitsubishi AC error code:
A Mitsubishi error code of six blinks on the timer light could mean an electrical (or physical) fault in the outdoor thermistor or the wiring connection to the outdoor PCB. Silverback Aircon can get to the bottom of the problem and resolve the issue. Talk to us via Whatsapp. We provide free consultations. We can also give you a quote on the possible cost of repair and parts replacement.
