Second Shift Heating & Cooling
Check the service area

COOLING AND AIR-CONDITIONING ROUTE / FICTIONAL EXAMPLE

WARM AIR?

Tell the route what the system is doing. Then check the example service area and prepare the details a real cooling call would need.

Check the service areaPrepare the fictional call

Second Shift does not provide air-conditioning repair or cooling service. This route is part of a fictional Hearn Systems website demonstration.

CALL ROUTE / 04 STEPS

  1. 01StateWhat changed?
  2. 02BoundaryIs the place in frame?
  3. 03CallWhat belongs in it?
  4. 04FaultDiagnosis before equipment.

LIFE SAFETY / EXIT THIS CALL PATH

SMOKE OR FIRE NEEDS 911.

If smoke or fire is present, leave the building and call 911. The fictional HVAC call path is not an emergency service.

Source: U.S. Consumer Product Safety Commission alarm and fire-safety guidance, checked 2026-07-15.

CURRENT SYSTEM STATE

NAME THE AIR, SOUND, WATER, OR UNIT STATE.

These details narrow the first call. They do not identify the failed part from a web page.

  • Air moves through the vents, but it feels warm.
  • The thermostat calls for cooling, but the room temperature does not fall.
  • The indoor fan runs while the outdoor unit stays quiet.
  • The system starts and stops.
  • A new sound begins indoors or outside.
  • Water appears near the indoor equipment.
SERVICE AREA / EXAMPLE FRAME

CHECK THE EXAMPLE BOUNDARY.

Named places demonstrate the interface. Second Shift serves no real address.

EXAMPLE LIST / 03 PLACES

  • 01Port Huron
  • 02Marysville
  • 03Fort Gratiot
  • --Final boundary remains open
Check the service area

CALL PREPARATION / 07 DETAILS

BRING THE CURRENT STATE.

  1. Example city or ZIP code.
  2. Central air conditioner, heat pump, window unit, or unknown equipment.
  3. Thermostat setting and room reading.
  4. Air state at the vents.
  5. Indoor and outdoor unit state.
  6. New sound, water, or repeated cycling.
  7. When the change started and what has already been checked.
Prepare the fictional call

DIAGNOSTIC VISIT

THE SYMPTOM LEADS TO MEASUREMENTS.

A diagnostic visit begins with the reported change, then checks the system involved. The written result should name the fault, proposed work, price, and any condition that changes the repair.

The web page can prepare the observation. The diagnosis belongs to the visit.

EQUIPMENT DECISION

ASK WHAT THE REPAIR CHANGES.

A repair decision needs the failed part, the rest of the system's condition, repair history, warranty, and price. Equipment age can inform the decision. It cannot decide the answer by itself.

01

REPAIR

Name the failed part, proposed work, price, warranty, and known conditions left in place.

02

REPLACEMENT

Add the house, sizing, installation scope, controls, warranties, and total installed price.