AC furnace blower kick on and off after 5s
#1
05-31-16, 11:45 AM
AC furnace blower kick on and off after 5s
I have a goodman awb24-08d furnace.The furnace has been working fine all winter. I recently turned on the A/c for the summer but the fan kicked on for 5s then kick off.I then went to the thermostat and try to manually turn on the fan but the Auto/on switch kick the fan on for 5s then off.If I turn the heat on the fan works perfectly.I just replaced the board control and blower capacitor.I have some pics.In the pic i disconnected NO and NC wire for test.Can anyone help?
http://imgur.com/a/sumPO
http://imgur.com/a/sumPO
#2
05-31-16, 01:24 PM
Member
You may have a bad blower motor. Generally, the blower runs at a different speed for heating and cooling. It's possible that the winding for the cooling speed is bad (probably shorted).
#3
05-31-16, 01:24 PM
As you can see in the wiring diagram in heat mode the fan is started by the heat sequencer and in cooling mode the stat starts the blower. Do you have a voltmeter?
#5
05-31-16, 02:55 PM
Set your stat to call for cooling and put your meter on G and C on the broad. You should have 24 volts.
#7
06-01-16, 03:58 AM
Member
24VAC is the nominal voltage, however it often runs slightly higher than that. 28VAC is okay.
