Seasonal maintenance has an image problem. Plenty of people have paid for a heating check, watched somebody spend a few minutes at the unit, and received an invoice and a sticker. It is reasonable to wonder what was actually done.
So here is the list. This is what a pre-winter inspection covers, item by item, and why each one is on it.
Why fall specifically
Heating equipment sits unused through a Carolina summer and then gets asked to run continuously on the first genuinely cold night. That is when faults appear, and it is the worst possible time to discover them — it is also the night every heating company in Cumberland County is already booked.
Checking it in October is not about the check itself. It is about finding the problem while it is still an appointment rather than an emergency.
Every system, whatever you have
- Filter. Checked and changed. Nearly every airflow complaint we see starts here, and a restricted filter makes the whole system work harder for less heat.
- Thermostat. Calibration, mode changes, and whether the temperature it reports matches the temperature in the room.
- Blower motor and wheel. Amp draw, bearing condition, and how much dust has built up on the wheel. A loaded blower wheel quietly loses you a large share of your airflow.
- Electrical connections. Tightened and inspected. Loose connections generate heat and are a common cause of intermittent faults that are maddening to chase later.
- Capacitors. Tested against their rating rather than eyeballed. A weak capacitor still runs the system until the day it does not.
- Condensate drain. Cleared. A blocked drain backs up and finds somewhere to go, and where it goes is usually a ceiling.
- Return and supply temperatures. Measured, so we know what the system is actually delivering rather than what it is supposed to.
If you have a heat pump
- Reversing valve. The component that switches the system between cooling and heating. If it has stuck over the summer, you will find out in December.
- Defrost board and defrost cycle. Verified that it initiates and terminates properly. A heat pump that cannot defrost turns into a block of ice.
- Auxiliary and emergency heat. Checked that the strips energize when they should, and just as importantly that they do not energize when they should not — the second fault is invisible except on your power bill.
- Outdoor coil. Cleaned. In heating mode this is the coil pulling heat out of the outside air, and it cannot do that through a layer of dirt and grass clippings.
- Refrigerant charge. Verified against operating conditions.
If you have a gas furnace
- Heat exchanger. Inspected for cracks and corrosion. This is the barrier between combustion gases and the air you breathe, and it is the most important item on the entire list.
- Burners. Cleaned and checked for correct flame pattern.
- Ignitor and flame sensor. Tested. A dirty flame sensor is one of the most common reasons a furnace lights and then shuts down again after a few seconds.
- Gas pressure. Measured and adjusted to specification.
- Flue and venting. Checked for blockage, corrosion and correct draft.
- Carbon monoxide. Tested around the appliance.
We cover the gas side in more depth in a separate article, because it deserves it.
What you can do yourself
Change the filter on schedule. Keep leaves, grass and shrubs clear of the outdoor unit. Test your smoke and carbon monoxide alarms and replace the batteries. Run the heat for a few minutes on a mild day in early autumn rather than discovering the problem on the first cold night.
That short list prevents a meaningful share of the calls we take.
Our HVAC maintenance plan covers this inspection in the fall and the cooling equivalent in the spring. If you would rather just book a one-off check, that is fine too.
If you would rather not deal with it
Getting the heating looked at before you need it is the cheapest thing on this page. We cover Fayetteville, Hope Mills, Spring Lake, Raeford, Dunn, Wade, Cameron, Parkton and the rest of Cumberland, Harnett and Hoke counties.
Call or text 910-748-8423, or send us the details and we will call you back. We are a family business and we answer our own phone.
Where this comes from
Rather have someone else do it?
Some jobs are worth a Saturday afternoon. Others involve refrigerant, gas or 240 volts. If this one crossed that line, we are a phone call away.
910-748-8423