Turning On Your Heater for the First Time: What New Rise HVAC Checks

In Dallas-Fort Worth, October marks the end of cooling season and the beginning of the uncertain shoulder period when overnight temperatures can drop into the 40s even when afternoons hit 80°F. The first real cold front — usually arriving sometime in October or early November — sends a wave of homeowners to their thermostats for the first heating test of the season. Many of them discover problems. Here is what to look for and what we check during a professional heating startup.

What Homeowners Should Do Before Calling

Before calling for a service appointment, run through these basic checks:

• Check the thermostat: Set it to heat mode and raise the setpoint 5°F above current room temperature. If the system doesn't start within 5 minutes, check the thermostat batteries first. Many no-heat calls in October are solved with a fresh set of AA batteries.
• Check the circuit breaker: The air handler (or furnace) and outdoor unit (if you have a heat pump) each have their own circuit breaker. Check that both are in the ON position.
• Check the filter: A severely clogged filter can prevent the system from starting safely due to thermal limits. Replace it if it looks gray and packed.
• Check the gas supply (gas furnaces): Confirm the gas shutoff valve near the furnace is open (handle parallel to the pipe = open).

What a Professional Heating Startup Inspection Covers

When a NewRise technician performs a fall heating startup inspection, here is what gets checked:

Gas furnaces: Ignitor function and ignition timing, burner flame color and shape (a yellow or orange flame on a gas furnace indicates incomplete combustion and possible CO production), heat exchanger visual inspection for cracks or corrosion, flue pipe condition and drafting, gas valve operation, heat rise measurement (the temperature difference between return and supply air — should be within manufacturer spec), and blower motor function and belt condition.

Heat pumps: Confirm proper heating mode operation and refrigerant pressures in heating mode, test auxiliary heat strips (electric resistance heating that kicks in during extreme cold), verify the defrost control board function, check reversing valve operation, and confirm system staging is correct for your thermostat.

Both systems: Thermostat calibration and staging verification, filter inspection and replacement if needed, airflow measurement, condensate drain check, and an overall assessment of component condition heading into the heating season.

The Smell on First Startup Is Normal

Many DFW homeowners call us in October reporting a burning smell when the heater first runs. In most cases, this is normal — it is dust that accumulated on the heat exchanger or heating elements burning off during the first run of the season. The smell should dissipate within 15–30 minutes and should not recur.

A burning smell that persists beyond the first run, a smell that resembles burning plastic or rubber, or any smell of gas near the furnace — these are not normal and warrant an immediate call.

Why October Is a Better Time Than November

October appointments are easier to schedule than November ones. Once the first major cold front pushes through DFW (historically mid-to-late November), every HVAC company in the metro is taking emergency calls from homeowners whose heaters didn't start. If you get your startup inspection done in October, you are ahead of that rush — and any issues we find can be addressed on your schedule rather than in an emergency.