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I have a mitsubishi air conditioning unit model MUH-12v. The fan on the machine outside has stopped and of course inside the air is not cold. Could this be a problem with replacing the gas or could it be a technical problem with the outdoor unit. Also I have noticed when I switch on the unit on the inside with the remote control that instead of two green lights comimg on I only have one green light flashing. Does that mean anything?

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Hi,
Here is a tip about Mitsubishi Air Conditioners and how to get the manuals for all of the mitsubishi line. The manual include both troubleshooting and installation.

Mitsubishi Air Conditioner Troubleshooting and Repair


heatman101

Posted on Aug 31, 2010

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2003 ford zx2 air conditioning not blowing cold air


Check and see if there is any Ice on the copper line that runs from condenser (outside unit) to air handler (inside) if so you need a charge. You can also make sure the fan is working on the condenser unit outside it should spin when you have the air on. If it is not you have a bad fan motor. there are other things it could be but these you can see.

May 25, 2015 | 2003 Ford ZX2

Tip

Tips for operating Air conditioning system on Toyota Hilux and someother...


To cool off your Toyota after it has been parked in the hot sun, drive with the windows open for a few minutes. This vents the hot air, allowing the air conditioning to cool the interior more quickly.

Make sure the air intake grilles in front of the windshield are not blocked (by leaves or snow, for example).

On humid, do not blow cold air on the windshield. The windshield could fog up because of the difference in air temperature on the inside and outside of the windshield.

Keep the area under the front seats clear to allow air to circulate throughout the vehicle.

On cold days, set the fan speed to high for a minute to help clear the intake ducts of snow or moisture. This can reduce the amount of fogging on the windows.

When driving on dusty roads, close all windows. If dust thrown up b the vehicle is still drawn into the vehicle after closing the windows, it is recommended that the in intake be set to FRESH and the fan speed to any setting except "OFF".

If following another vehicle on a dusty road, or driving in windy and dusty conditions, it is recommended that the air intake be temporarily set to RECIRCULATE, which will close off the outside passage and prevent outside air and dust from entering the vehicle interior.

HEATING

For best results, set controls to;
Fan speed ---- Any setting except "OFF"
Temperature----Towards WARM (red zone)
Air intake ---- FRESH (outside air)
Air flow ---- FLOOR
Air conditioning ---- OFF

For quick heating, select recirculated air for a few minutes. To keep the windows from fogging, select fresh after the vehicle has been warmed.

Press the "A/C" button on for dehumidified heating.

Choose floor/windshield air flow to heat the voltage interior while defrosting or defogging the windshield.

AIR CONDITIONING

For best results, set controls to;

Fan speed --- Any setting except 'OFF"
Temperature --- Towards COLD (blue zone)
Air intake --- (outside air)
Air flow --- PANEL
Air conditioning --- ON

For quick cooling, move the air intake selector to recirculate for a few minutes.

VENTILATION

For best results, set controls to;

Fan speed --- Any setting except 'OFF"
Temperature --- Towards COLD (blue zone)
Air intake --- (outside air)
Air flow --- PANEL
Air conditioning --- ON

DEFOGGING

The inside of the windshield

For best results, set controls to:

Fan speed --- Any setting except 'OFF"
Temperature --- Towards WARM (red zone) to heat; COLD (blue zone) to cool
Air intake --- FRESH (outside air)
Air flow --- WINDSHIELD
Air conditioning --- ON

The outside of the windshield

For best results, set controls to:

Fan speed --- Any setting except 'OFF"
Temperature --- Towards WARM (red zone)
Air intake --- FRESH (outside air)
Air flow --- WINDSHIELD
Air conditioning --- OFF

On humid days, do not blow cold air on the windshield. The windshield could fog up because of the difference in air temperature on the inside and outside of the windshield.

DEFROSTING

The outside of the windshield

For best results, set controls to:

Fan speed --- Any setting except 'OFF"
Temperature --- Towards WARM (red zone)
Air intake --- FRESH (outside air)
Air flow --- WINDSHIELD
Air conditioning --- OFF

To heat the vehicle interior while defrosting the windshield, choose floor/windshield air flow.

on Feb 14, 2011 | Toyota Pickup Cars & Trucks

1 Answer

My outside a/c condensing unit's fan runs, but inside vent air is not cold. compresser may not be running. inside vent air was cold last week. Janitrol ckj361ab is model # of outside unit.


Start the unit and go outside to see if the insulated pipe is sweating or cold, hot air should be discharging from top of outside unit. Since the breaker is not tripping, my best guess is the compressor is not operating. You might have to replace the capacitor.

If you can hear the compressor operating, then most
likely needs refrigerant

Jun 17, 2010 | Heating & Cooling

1 Answer

I have a heat pump and it freeze up


If you are referring to the outside unit freezing up, the issue is in the defrost cycle. The defrost cycle works something like this: The unit reverses the flow of freon causing the inside coil to blow cold air into the conditioned space and the outside coil is now working like an a/c unit, it gets warm to melt the frost/ice. The inside unit electric heat strips come on so you do not notice the cold air being blown in. The fan on the outside unit stops running to allow the coil to get good and warm.
Now the unit should go into the defrost cycle every 90 minutes or so. It should not terminate the cycle untill the coil is clear of frost. There is an "Klixon" type termostat that measures the temperature of the outside coil. This is most likely the problem. It is prematurely terminating the defrost cycle. I'd start there first.

Hope this helps, Let me know if I can be of any further help.

Dec 29, 2009 | Intertherm P3RC-030K Air Conditioner

2 Answers

My Carrier Home AC unit stopped blowing cold air today. I opened it up and cleaned everything and didn't notice anything out of place, any ideas?


This could be complicated to resolve over the internet but I'll give it a try. When you stated that it stoped blowing cold air, did it stop blowing air all together? Also is the outside unit rtunning?

Sep 05, 2009 | Carrier 38CKC042 Air Conditioner

1 Answer

House HVAC Not Blowing


If the outside unit is running and the inside unit is not, probably a problem with the fan motor itself or its capacitor. If you have to have someone repair or replace the fan $200-$250 with parts, a capacitor for a service call and part $100 or so. Check it yourself first to see if there is anything obvious broken wire, hot connection, etc if you feel safe doing that. Turn the power off first. There is also a chance the thermostat could be the problem. Have you tried running the fan on the thermostat "fan on" setting?

Jul 01, 2009 | Goodman Heating & Cooling

2 Answers

Bryant air condition fan outside not coming on


Check breaker for outside unit Also check to see if you ahve afloat switch on the inside air handler. Located under or in front of unit. It may be full of water and tripped. Blow out drain if tripped.

Jun 15, 2009 | Ruud UBHC Air Conditioner

1 Answer

Starts then stops


If the fan is running ,I would say you have a freon problem.If the units starts and stops in a few seconds,then it is freon.WHICH MEANS YOU HAVE LEAK SOMEWHERE.

Mar 23, 2009 | Mitsubishi Heating & Cooling

2 Answers

Mitsubishi MSH 18NV no heating or cooling


The fact that nothing is coming on indicates that there is possibly a problem with your incomming power supply or wiring to and from the inside evaporator to the outside condenser. If all in good order, suggest you find someone you know who can operate a multimeter and check if there is voltage going to the control board inside the evaporator unit. If there is then almost certainly the control board would need replacement.

Feb 05, 2009 | Mitsubishi MSH09TW Air Conditioner

1 Answer

Mitshubishi split muh-18nvand inside msh-18nv


-Start the unit.
-Press EMERGENCY OPERATION switch.3-minute time delay works.Test run operation operates for 30 minutes.
-Check voltage to terminal block of outdoor unit.Is there 12V DC between 2-1?
-If voltage is presenet check the wiring, compressor contactor outdoor fan motor and compressor.
-If no voltage check voltage to terminal block of indoor unit.Is there 12V DC between 2-1?
-If if voltage is present re-connect the continuity of indoor and outdoor unit connection.
-If no voltage replace the indoor electronic control P.C.
board.
-But also check the coil thermistor sensor and room air thermistor if this two is out of range it can cause the tripping of out door unit. It has the resistance of 8 to 10 k ohms at 25 deg c temp.
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Jan 04, 2008 | Heating & Cooling

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