Compressor fails to restart

Possibly a tstat issue. Run system until satisfied, once satisfied indoor fan shuts down compressor still runs remove tstat face plate and see if compressor shuts down. Another issue could be a sticking contactor for compressor. With a meter you could check at the contactor to see if you lose your 24volts for cooling but contactor remains pulled in.

Normal ACs (non inverter) work in the following way

• The AC compressor runs continuously till set temperature is reached in the room
• The compressor then switches off, but the blower fan in the wall mounter unit keeps running. Durint this time the AC fan blows air out at Room temperature (which feels warmer)
• When temperature of room rises then compressor starts running again. During theis period the air coming out from the inner uny is cooled by the condenser coils
• And the process is repeated.... as long as you keep AC running

Ac works this way throught the operation period.
Now if you feel that your AC keeps switching off and on very frequently check the following

• Your AC may be over powered for room *for example a 1.5 ton AC installed in a scenario where 1 ton is enough)
• If there is voltage fluctuation in your area then the compressor may keep shutting don on large voltage swings
  • Solution: Get a Stabilizer
• You have set the temperature setting too high. Max temp suggested for ACs is 25 degree Celsius, any higher will mean the compressor shuts down often. Remember every compressor shutdown and startup draws a high starting current
  • Set AC temperatures between 22 and 24 degrees Celsius
• The thermostat/ Temperature sensor is faulty
  • Get unit inspected by Authorized technician
• There is dust buildup on the outer unit / compressor unit. The dust buildup may cause overheating by preventing efficient heat exchange, This may lead to overheating of compressor and it shuts down to, prevent damage to itself
  • Get unit serviced by Authorized technician
• The fan motor of the outer unit is not working properly
  • Get unit inspected by Authorized technician

Remember to get the AC serviced at least thrice a year to ensure smooth operation
Cool Thoughts... Cool Life !!!

look like the program is not working. if the set temp, is lower than the real temp, heather should come on.
if the set temp is higher than the ambient temp. the ACC should come on.
I will try one first, then setup the other.

Make sure the Thermostat is set correctly! The problem with mine was the temp in the house was colder than my A/C lowest thermostat setting.I had my AC temp setting on 66 degrees.The temp in the house was a little lower so the AC didnt kick on just the fan blowing cool air and no compressor working. The next day it was warmer out and the house temp was 79. So when I powered up the AC set at 66 i heard the compressor kick in and the AC worked fine.

so your reported figures show that the unit is operating as planned
the closer to ambient temp the shorter it runs for
the further away from ambient temp the longer it runs for
when the desired temp is reached , the compressor will stop but the fan will continue to run to circulate air past the thermostat so that it will switch back on when the room temp reaches too high temp
and that is why it is recommended to set the temp at 25 C as that is the most economical temp to run it at

Hi!!

Check the following:

Make sure the filter and the evaporator coil are clean. Also check condenser coil in the outside unit is clean.

When unit is turned on there should be (on the led display, inside unit) one green light on for the blower and another one for the compressor, both lights should be ON untill the unit reaches the preset temp. If the light for the compressor (usually the light on the right side) does not stay ON, check the outside unit.

On the outside unit, check that when turned on, both the fan and the compressor kick in and stay running. If the fan motor stops, the compressor overheats and the thermal proteccion shuts it down to prevent damage. Also, if the R22 gas is low, the low pressure switch prevents the compressor from running.

Good Luck!!

You will have to find the contactor which is located in the outside unit. And check the voltage at the contactor, 26 v as this is the thermostat calling for the compressor to come on. You can also push in the contactor and see if the fan and compressor start. There should be an outside fuse box close to your condensing unit. Good luck

Hi it sounds to me like what actvates the 2nd stage of the compressor is not turning the compressor on when the ambeint temiture reaches the point that it calls for the 2nd stage to start it may be an out door thermostat or a ambient senser and I would request a new Tec to come out and ckeck

You probably need a hard-start kit. A hard-start kit connects to the run capacitor and provides a starting boost for your compressor. If you install a hard-start kit, monitor your a/c for a while because it is possible that the bearings in the compressor are going bad.

DOES THE HOUSE FEEL DRIER IF IT IS 80 OUTSIDE WITH ALOT OF HUMIDITY THE UNIT WILL RUN FOR A LONG TIME TO REMOVE THE MOISTURE(HUMIDITY) OUT OF THE HOUSE BEFORE TEMP DROPS DRAMATICALLY IS THERE WATER COMING OUT OF THE DRAIN PIPE OUTSIDE