UNIT RUNNING FINE YESTERDAY NO COOL TODAY
SOURCE: Carrier Air Conditioner, cool air then runs luke warm air
Have you checked the freon level in this unit? If you are low or there is a leak it could be the problem. Hope this helps.
SOURCE: please help carrier 38ck03040 outside
Hi,
Here is a tip about troubleshooting your air conditioner...
There are many things that can cause your air conditioner not to cool...
AirConditioner Trouble - Review the Possibilities
heatman101
E5 indicates excessive temp. of the outside coil if on cooling, OR excessive temp of the inside coil in
heat mode. On cooling, the E5 will appear if the outside coil temp exceeds 68C. This is an indication
of condenser airflow reduced or non-existent. Using the procedure described above it is possible to
watch the condenser coil temp using the Temp down button and Medium fan speed combination to
display this temp. NB: if fans etc seem to be OK then measure thermistor resistance and refer to table
12. In case the problem is thermistor calibration.
Action: If unit is in cooling mode, examine both condenser fans are running. If
one is running then suspect a faulty motor. If both fans not running then
on units up to serial No. IBSA 01175, investigate the fan speed control
card located in enclosure on the LHS See fig 6.
If this checks OK then investigate main control card.
Fig 1, 2 or 3. Units with serial No's IBSA01176 and
onward are multi speed tapped wound motors not requiring a speed
control card. If both motors inoperative then suspect main control card
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