2009 rheem gas furnace. Found furnace breaker tripped. Customer has pushomatic breakers. Checked everything inside the furnace and found no issues that could be potentially causing the breaker to trip. Let customer know breaker may be getting weak. Keep an eye on it. If it counties to trip have an electrician replace breaker or he can do it himself if he feels comfortable. Temp split on ac is 18 degrees. All okay at this time.