Check breaker panel for tripped AC circuit.

Could be a faulty thermostat, loose wire connection.

The possibilities are numerous.

However, the fact that blower works in heating mode is a good sign.

IMO

I switched off main circuit breaker for 15 min and turned it back on, no luck. The fans did not start. Yes at least the blower works in heating mode which is good. I might need to have someone to check the wiring part.

Turn off the main breaker for 24 hours and If nothing happens call a technician.

lanjin,

You might want to consider calling the company that put in your furnace. did the A/C worked before you replaced the furnace? If it does, the people who put in the furnace could accidently wired the 24v wires incorrectly in the furnace. Your furnace controls the A/C also.

Will blower fan run if u set thermostat to "on" or run instead of auto? The blower fan is separate from outside condenser fan but we all know that. Seems vague when folks say "fan" runs. Which fan?

sounds like he fixed it.