An expert who has written 20 answers of more than 400 characters.
Re: failure during operation
No. The fan setting simply runs the fan full time bypassing the thermostat. In cooling mode the unit is slave to the thermostatic sensor located in the return air stream. If the unit is in a very small room or the exiting cool air is obstructed by furniture or curtains then the cool air is directed directly back to the sensor before mixing with the room air, causing erratic operation. Be sure several square feet of floor space is open in front of the unit and point the vent upwards and see if that makes a difference. Hope this was somewhat helpful, GL.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
12.11 Freeze Prevention Control 2
• Control start conditions
o During Cooling operation and soft dry operation ? During thermo OFF condition, indoor intake temperature is less than 50°F or ? Compressor stops for freeze prevention control
o Either one of the conditions above occurs 5 times in 60 minutes.
• Control contents
o Operation stops
o Timer LED blinks and "H99" indicated
You may need the assistance of a technician. Service manual located here:
At what temperature is the thermostat?
The temperature should never be lower than 70?F (21?C) for the unit to operate properly. If your temperature setting is above 70?F, then your unit might have a problem with the temperature sensor that controls the "on/off" cycle on your unit. For that you will need a professional certified HVAC tech to inspect it.
Most people think that lowering the temperature to the minimum will cool the room faster, but that is not the case. Since HVAC units move the air at a specific rate, it can only transfer the temperature, thus cooling/heating the air, within those parameters. That's what the calculation for the BTU is for. Normally cooling/heating the room to the desired temperature should take about 1 hour, but some new inverter units can do it in only 30 minutes or so. Lowering the temperature constantly or even keeping it at the lowest setting may cause premature failure of the unit.