Mitsubishi Heating & Cooling - Page 5 - Recent Questions, Troubleshooting & Support

Push the reset button of your remote control and try. If it wont work try to "off" and "on" the circuit breaker to reset the unit and try the remote control.


Mitsubishi... | Answered on Oct 27, 2017

Here is a YouTube video that helps you calculate tonnage of an AC.
The only way to know the running current if it's not on the AC info plate with all the other info is to measure it.

Calculating tonnage of your air conditioner

Mitsubishi... | Answered on Oct 14, 2017

the timer may have been activated at installation or by someone not fully conversant with the operation

use the remote and follow the instructions in the owners manual to turn the timer off

Mitsubishi... | Answered on Sep 06, 2017


Mitsubishi... | Answered on Sep 05, 2017

The temperature you see on your remote is the setting temperature. It does not display the current room temperature. All ductless systems work the same way. They just don't show what the current room temperature is. Not sure why.

Mitsubishi... | Answered on Sep 02, 2017

normally most systems can reverse the flow of refrigerant to act for heating but in e-heat mode the system is pushing heat in by its own internal fan only in normal heat mode however the system may take a while to adjust and turn on but as stated in e-heat mode it may only push heat in by its own internal fan some systems may do this

Mitsubishi... | Answered on Aug 22, 2017

Ductless split systems are know for creating a mildew looking "stuff" on the blower wheel. Try to open/move the louvers on the front of the indoor unit. By opening the "osculation blade"/louvers, you can see the blower wheel, normally blue in color. See if it has some mildew growing on it. If so, I found that a tooth brush and about 2 hrs labor does some good. I've found some aerosol spray, called mildew removal. Works great at covering up/controlling the smell. It's also possible that the unit is pulling air from the condensation drain line. These lines can for algae, and give us a sour yuck smell. To clean, use a wet vacuum, and clean from the outlet of the drain line. Hope this helps!

Mitsubishi... | Answered on Aug 21, 2017

2502 code indicates float switch issue. Try taking a wet vac to the outlet of the drain line and cleaning it by vacuuming the outlet. This will clear the drain line if it's not tied in with multiple drains, but may not clear the code. To clear, try tuning off breaker(s), wait 10 mins, then turning breakers back on. If this doesn't help then there is an issue with the float switch or the control board. Float switch is supposed to prevent the drain from over flowing and is normally located in the condensate pan, but I don't advise anything else, other than cleaning the drain line and resetting the system.

Mitsubishi... | Answered on Aug 21, 2017

Sounds like a programming error. Did this happen with a loss of power? Is this a tstat and remote combination?

If you need further help, reach me via phone at

Mitsubishi... | Answered on Aug 12, 2017

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