Second Shift Heating & Cooling
Check the service area

HEAT-PUMP ROUTE / MICHIGAN HOME QUESTIONS

1 SYSTEM. 2 DIRECTIONS.

A heat pump moves heat into the house for heating and out of the house for cooling. The useful next question is what the equipment and the house need to do together.

Prepare the fictional callCompare repair and replacement

Second Shift is fictional. It does not install, repair, replace, or quote heat pumps.

CALL ROUTE / 04 STEPS

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

HEAT-PUMP BASICS / DOE SOURCE

IT MOVES HEAT.

In cooling mode, a heat pump moves heat from the house to the outdoors. In heating mode, it moves heat from outdoors into the house.

Some homes use a heat pump as the main heating and cooling system. Some pair it with a furnace. Equipment, controls, house, and cold-weather plan need to be read as 1 system.

Source: U.S. Department of Energy heat-pump systems guidance, checked 2026-07-15.

MODE AND STATE

START WITH WHAT CHANGED.

Mode, thermostat reading, outdoor temperature, and the observed change belong in the call. A web page cannot turn those details into a diagnosis.

  • Heating mode runs without raising the room temperature.
  • Cooling mode runs without lowering the room temperature.
  • The system changes modes at the wrong time.
  • The outdoor unit stays quiet or makes a new sound.
  • Backup heat appears to run differently.
  • Water or ice appears where it did not appear before.

MICHIGAN HOUSE FIT

READ THE SPECIFIC SYSTEM AGAINST THE HOUSE.

Cold-climate equipment is built for lower outdoor temperatures. A proposal still needs to show how the selected equipment performs at the home's heating conditions and what supplies heat when capacity changes.

Ask for the equipment model, sizing basis, design temperature, backup-heat sequence, electrical work, duct changes, controls, and total installed scope.

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

HOUSE AND SYSTEM RECORD

BRING THE CURRENT SYSTEM AND THE HOUSE.

  • Current heating fuel and equipment.
  • Current cooling equipment.
  • Heat-pump model, if one is already installed.
  • Thermostat mode, setting, and room reading.
  • Outdoor temperature when the change appears.
  • Rooms that run hotter or colder.
  • Ducted, ductless, or mixed distribution.
  • Electrical or house work already included in a proposal.
Prepare the fictional call

THREE ROUTES / THREE FACT SETS

REPAIR, REPLACE, OR ADD.

01

REPAIR

Diagnosed fault, work scope, price, equipment condition, and repair warranty.

02

REPLACE

Old system, new equipment, sizing basis, distribution changes, controls, removal, permits, and total price.

03

ADD

Current fuel, cooling equipment, electrical service, duct or room layout, cold-weather plan, and installation scope.