I have a old central air conditioner and this year when I clean it and turn it on the fan did not turn on. The fan runs when the air conditioner runs. I know a lot of thing about building but not this could anyone tell me what I am try to do

Did you hit the blower plug accidentally when you were cleaning it? Is there a wire off one of the screws or the G terminal on your blower?

I did not see a wire off but will check again also do you know where I can get a manual for a Signature central air conditioner that would help so much and thanks for the reply

Does your thermostat have a fan "ON" switch and if so will the blower come on when you switch it to ON? Does the blower try to start, hum or do anything? Have you checked all your circuit breakers? You could also have a bad blower relay.