Mitsubishi Heating & Cooling - Popular Questions, Answers, Tips & Manuals


An EO error indicates an electronic error caused by either a control board problem or a problem with supply voltage to the heater. A single EO code is not cause for concern, but for repeated EO codes

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Check the code to see what that one means.

The codes are on the inside of the indoor unit cover. See this link to find them.

https://www.visionair.com.sg/blogs/news/what-does-it-mean-mitsubishi-electric-starmex-blinking-lights

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I got this free Pdf manual from reliable-store. com for free and I don't think Ive visited a mechanic or fixya for help for more than 3-4 times out of the 20 times I fixed the chipper in these 4 years

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It is, more than likely, that it is not coming from your unit. Is someone burning candles? If they are, please stop burning them and use a candle warmer instead. The burning flame of most of the candles today, produce a lot of very unhealthy pollution in the soot that they produce, not to mention the health aspects to you. Scented candles are the worst. The unit usually gets blamed for picking this up and redistributing the particles back into the air.

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It's likely being overworked and therefore growing mildew on the fins. Clean the filter and rinse the coil with mild soap/water mix. Wipe down the unit with a damp rag.

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Should have a dry contact on the board, cant remember what number (m4?), possibly loose wire or cut. Put a jumper and see what happens

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If I was you I would pull the power disconnect to the condensing unit. You may also want to cover the condenser only to keep dogs or cats from urinating on the unit. If there is no possable way that will happen no need to cover it. When you come back in7 monts make sure the breaker is off to unit and wash condensing coil with high pressure from garden hose.

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14 flashes is a fault code. You need to determine which light is flashing and look at an online Mitsubishi fault code analysis chart for your model. The light(s) that flash determine the fault. Power, defrost, timer light flash all mean something different.

Mitsubishi... | 920 views | 1 helpful votes


Put on an inside wall away from doors or open windows 5' above the floor and if you have an air vent close shut it

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https://www.manualslib.com/manual/831695/Mitsubishi-Mr-Slim-Pka-A24ka4.html#manual

power one first, then the other or the other first and then the one. check the power to both units, the settings, condensation pump interlock, no real quick fix until you know the charachter of that unit

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You cannot set it that low. It depends on your outside temp? Have you cleaned the filters and condenser coil? The lowest I recommend setting it at is 20. Any lower and you could freeze up the indoor coil. Once it thaws out you will have more water than the pump/drain can handle.

Mitsubishi... | 47 views | 0 helpful votes


What is the M# S# of unit. Without it I cannot find your codes. Have you cleaned the filter and condenser coil?

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What is the M# S# of the unit?

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This could be the compressor start and run capacitor. They are not that expensive but not everyone sells them without sending out a technician and then the bill starts at about 200. IF you are not used to working with something like this, it is better to call a tech.

Mitsubishi... | 57 views | 0 helpful votes


No Mitsubishi units are critically charged. Use only R22. They engineer the heck out of their units....they don't like other refrigerants in the system and won't warranty any problems with any other refrigerants

Mitsubishi... | 107 views | 0 helpful votes

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