I think, there is a leak in the main drain line of your AC system. Last month, a friend of mine has also suffered from the same problem but thanks to the team of emergency ac service Bergen County NJ who helped him by giving the proper service. There is a possibility of who air conditioner...
If you are still confused on how to access the HVAC unit, I would advise you to consult some professional who have deep knowledge about the field. They can give you the clear steps on how to access your HVAC unit. Some of the professionals I know are heating Bergen County NJ, DB heating and...