I have a Coleman 3300L823 (23Kw /78,000 BTU) furnace and every 4 or 5 hours the lower circuit breaker goes off.

Once I reset the breaker, it works for several hours and then goes off again.

The weather has been very cold these last couple of days and I am wondering if it has anything to do with the weather.

Does anyone have any ideas on how to correct the situation.

You need an amprobe(used to check how many amps motors and other parts are pulling ) during startup and operation. If the motor is pulling more amps than what the breaker is designed to handle the breaker will kick. Also the breaker could be going bad ,overheating and needs replaced