Emergency HVAC in Central CT: What to Do First When Heat or AC Fails

Step 1: Start with safety

If you smell gas, hear unusual hissing, or suspect a carbon monoxide issue, leave the home and contact emergency services immediately.

For electrical burning smells or visible smoke, shut off power to the system and do not attempt to restart.

Step 2: Check the thermostat and settings

• Confirm the mode is correct (`Heat` or `Cool`).
• Set temperature 3-5 degrees beyond room temperature to force a call.
• Replace thermostat batteries if the display is weak or blank.

A surprising number of no-heat/no-cool calls trace back to simple control settings.

Step 3: Check power and airflow basics

• Check breakers and reset once if tripped.
• Confirm furnace/air-handler service switch is on.
• Inspect and replace a heavily clogged filter.
• Make sure vents and returns are not blocked.

If a breaker trips again or the system short-cycles, stop troubleshooting and call for service.

Step 4: Know what not to do

• Do not repeatedly reset the system.
• Do not bypass safety switches.
• Do not continue running a unit making loud mechanical noises.

Repeated restart attempts can increase damage and make diagnostics slower once a technician arrives.

Step 5: Prepare the right details for dispatch

Having these details ready speeds up emergency service:

• Equipment type and approximate age
• What changed right before failure
• Any error code shown on thermostat or control board
• Whether the issue is no heat, no cooling, or intermittent operation

How to protect your home while waiting for service

In winter no-heat events:

• Use safe temporary heat in occupied rooms only.
• Open cabinet doors near plumbing on exterior walls.
• Let faucets drip slightly if freeze risk is high.

In summer no-cool events:

• Close blinds on sun-facing windows.
• Use fans to support air movement.
• Reduce oven/stove use during peak heat hours.