Need help with Lennox furnace blower

Starting earlier this week I've noticed that my heat upstairs wasn't working and I was getting an error for "Primary/Secondary Limit Switch" on the LED diagnostic. What was happening is the furnace (Lennox G24M3-75A-12) is firing up but I noticed the blower isn't working and then after a minute or so the furnace shuts down. I have so far replaced the primary limit switch thats on the front in the heat exchanger and the secondary limit switch thats on the back of the blower. Further research showed that it might be the run capacitor so I brought one today. Installed it and viola the blower came on after a little bit. I let it run for 5-10 mins and I think its fixed, warm air coming out of the vents and everything. When I go to button everything up though it turns off and shuts down giving me the same error.

It seems most definitely blower related as I have replaced both limit switches and the capacitor and when I replaced the capacitor I saw some life from the blower. Anyone have any suggestions or ideas about what it could be? I saw a Youtube vid where the guy said to test the blower motor with an ohmmeter and I did. Readings were fine 3.x, 5.x, 7.x and 7.x.

It should be noted that when I turn on just the fan or the AC at the thermostat that the air and blower both doesn't come on but the outside AC unit does.

 

If the motor is getting voltage and it has a new capacitor and still fails to run, you need a new motor.

 

Thank you Houston for your reply. Do you think that would be the case even if the blower started running for about 10 mins?

 

Also how can i tell its getting voltage?

 

If it ran for 10 minutes it sounds like it's getting power. Feel it. If it's real hot.... it's history

 

I use a volt meter.
Put one lead on white and the other ACB LOW to measure FAN, or ACB HEAT to measure heat mode fan, or ACB COOL to measure cool mode fan.
You want 120 volts AC.