How does an air conditioner work

[John Frum]

My air conditioner cools the room when the compressor in on.
I suspect that the thermo-regulation function is getting erratic though.

I've not really quantified this behavior yet.
I've watched a youtube video and have a basic understanding of how the frefridgerent absorbs and dissipates heat by means of pressure differential and conduction.

I notice there is a thermistor in front of the evaporator.
Is that the sole means of thermo-regulation?
I guess it turns on/off based on the resistance of the thermister.
There is probably a minimum duty cycle timer as well to protect the compressor.

How does the logic work?
Is there another mechanism to disable the unit in case of over-temperature.

I'm off to poke it with a stick.
Wish me luck.

 

[John Frum]

Here is the manual https://gscs-b2c.lge.com/downloadFile?fileId=KROWM000457938.pdf

 

[time2roll]

Thermistor on the evaporator is probably a freeze sensor and will cycle the compressor if the evaporator is freezing up.

Hold some ice on it to see what works.

 

[John Frum]

Thermistor on the evaporator is probably a freeze sensor and will cycle the compressor if the evaporator is freezing up.

Hold some ice on it to see what works.

The thermistor that sits in front of the evaporator cycles the on from off state when I hold the sensor between my fingers.
Also cycles the unit from on from the off state when I put a cod get pack on the sensor.

I found this video

The unit is not the same as mine but hopefully similar.
There seems to be another sensor in a tube on the side of the evaporator.
I wonder if that is the freeze sensor.

Looks like I will have to take the unit out of the window to explore further.
That is a job for a cooler day.

 

[time2roll]

OK then it is just the ambient room temperature sensor.
Really need the service-installation manual rather than the consumer instruction manual.