Air conditioning on radiator fan always on?

[The pony boy]

I have been battling a random overheating problem. Today I changed the thermostat and while checking for leaks and purging the system I put the air conditioner on. After about 2 minutes the radiator fans shut off. Is this normal? Thanks Phil.

 

[jman1200]

If the AC compressor turned off (clutch disengaged) then yes, its normal.
Fans should always be running along with the compressor.

 

[The pony boy]

Could the system being low on Freon cause the compressor to disengage thus turn fans off?

 

[jman1200]

Not sure I understand why you are asking that.
The compressor is supposed to turn on and off all the time during regular normal operation. It should cycle a few times every couple of minutes once the desired cabin temperature is reached.

And normally no, low refrigerant will cause the compressor to run continuously until the evaporator freezes and/or the refrigerant level is so low that triggers the low pressure switch, and it will not re-start once that happens.