The present invention provides an Internet based detailed service notification system to inform the contractor of a customer in need of HVAC servicing. The thermostat has Internet connectivity provided to it. Whenever the customers need servicing or repair of their HVAC devices, they have a special menu/interface at their disposal in their thermostat which assists the customer's service request to be registered on the thermostat company's web server. The company's web server having all the details of the thermostat owner, then automatically forwards these details to the preferred contractor through SMS, through email or an automatically generated call. The details include the address details, phone numbers, type of service needed e.g. servicing, repairing, new device installation, replacement and the like.