What You’ll Learn
What can I do to maintain my HVAC system on my own?
You can safely change your furnace filter every month, ensure your indoor vents aren’t blocked or clogged, and keep the area around your outdoor condenser unit clear.
Small DIY tasks like these can play a big role in your overall HVAC maintenance when paired with a seasonal tune-up.
In this blog:
Ken disassembled his blower motor with a YouTube video and a prayer.
It seemed like he had fixed the issue when his HVAC system kicked on just fine later that day.
Two weeks later, the same problem was back.
Ken had simply put a bandage on the blower motor instead of finding the underlying issue.
There’s a time to be a self-reliant homeowner, and there’s a time to call in the big guns.
Knowing what you can and can’t safely check yourself on your HVAC system will save you time, money, and comfort.
The Professional Tune-Up: Beneath the Surface
When a technician arrives at your home for a seasonal tune-up, they aren’t just “looking” at the unit. They are performing a diagnostic on a machine that has thousands of moving parts.
A professional tune-up is designed to identify “silent killers”—small points of wear that haven’t caused a breakdown yet but will inevitably fail during a heatwave or a cold snap.
Professional tune-ups usually include these four categories:
1. Deep Cleaning of Internal Components
Dust is the enemy of efficiency.
During a professional cooling tune-up, a technician cleans the evaporator and condenser coils.
If these coils are even slightly coated in grime, they can’t exchange heat effectively, forcing your system to run longer and hike up your electric bill.
They also clear the condensate drain line to prevent water backups that can lead to mold or flooded basements.
2. Electrical Connection & Amperage Checks
HVAC systems pull a significant amount of power. Over time, vibrations can loosen electrical connections, leading to “pitting” or even fire hazards.
A technician will tighten every terminal and measure the amperage draw of your motors.
If a motor is pulling more power than it’s rated for, it’s a sign that the bearings are failing, and a total breakdown is possible.
3. Testing Safety Controls
Your furnace and AC are equipped with multiple safety switches designed to shut the system down if things get dangerous (like a rollout switch or a high-limit switch).
The technician will test these to ensure that if a component fails, the safety backups will actually trigger.
4. Combustion Analysis (For Heating)
For propane systems, this is the most critical step.
Technicians use specialized sensors to measure the gases leaving your chimney. This ensures your fuel is burning cleanly and, most importantly, that no carbon monoxide is leaking into your living space through a cracked heat exchanger.
The Homeowner’s Checklist: What You Can Safely Do
While you should leave the high-voltage wires and gas manifolds to us, your ”DIY” contributions play a big factor in the overall lifespan of your system. Think of these as the “vitamins” for your HVAC unit in between check-ups.
1. The 30-Day Filter Check
This is the single most important task for any homeowner.
A dirty air filter restricts airflow, putting massive strain on the blower motor. Check your filter every month.
If it looks grey or furry, replace it. If you have pets or allergies, you might need to do this more frequently.
2. Clearing the Vents
Take a walk through your home. Ensure that no rugs, curtains, or furniture are blocking the supply or return vents.
Your system is designed to breathe a specific volume of air; blocking vents creates pressure imbalances that can lead to a frozen coil or a cracked heat exchanger.
3. The Outdoor Perimeter Check
Your outdoor condenser unit needs room to exhale heat.
Ensure there are at least two feet of clear space around the unit. Trim back any bushes, remove fallen leaves, and make sure no weeds are growing into the delicate metal fins.
4. Thermostat Sanity Check
Sometimes, a “broken” HVAC system is actually just a thermostat in the wrong mode or with a dead battery.
If your system isn’t kicking on, check the batteries and ensure it hasn’t been bumped into “Fan Only” mode by mistake.
The Risks of Crossing the Line
It can be tempting to try to save a few dollars by attempting a repair yourself.
However, it’s important to weigh the potential savings against the very real risks of DIY-ing complex HVAC work.
- Voiding Your Warranty: Most modern HVAC manufacturers require proof of professional annual maintenance to honor their warranties. If you attempt an internal repair and something goes wrong, the manufacturer may refuse to cover the cost of parts.
- Safety Hazards: HVAC systems involve high-voltage electricity and pressurized refrigerants. Handled incorrectly, these can cause severe shocks or chemical burns. Furthermore, improper handling of gas lines or venting can lead to carbon monoxide poisoning.
- Overlooking the “Why”: A DIYer might find a blown fuse on their HVAC system and replace it. A professional will ask why the fuse blew—was it a failing capacitor? A shorted wire? Replacing the fuse solves the symptom, but the professional solves the problem.
A Tune-Up is an Investment, Not an Expense
We know that scheduling a tune-up is one more thing on your to-do list, but there’s a reason we recommend them so strongly.
A well-maintained system operates roughly 15% to 20% more efficiently than a neglected one.
In Pennsylvania, where our summers can be humid and our winters harsh, that efficiency translates directly into lower monthly bills.
At Kauffman Gas, we’re ready to help you invest in a safe, comfortable home.
Contact us today to schedule your HVAC tune-up.
FAQs
How often should I really get a professional HVAC tune-up?
We recommend a professional check-up twice a year: once in the spring for your cooling system and once in the fall for your heating system.
This ensures each component is ready for the specific demands of the upcoming season and helps catch any issues that may have developed during the off-season.
Does changing my air filter really make a difference in my energy bill?
Yes, a significant one. A clogged filter forces your blower motor to work twice as hard to move air through your home.
This increased static pressure consumes more electricity and generates more heat within the motor, which can shorten its lifespan.
A clean filter is the simplest way to keep your utility bills in check.
Can I clean the inside of my furnace or AC unit with a vacuum?
While you can vacuum the area around your furnace or the floor vents, you should never open the internal cabinet of your furnace or AC to vacuum.
The internal components, particularly the delicate aluminum fins on the coils and the electronic circuit boards, are easily damaged and can carry a residual electrical charge even when the power is off.