Furnace or Heat Not Working
If you're dealing with furnace or heat not working, this guide walks through what the symptom usually means, the causes worth ruling out, the checks you can safely do yourself, and the point where it's time to bring in a technician. Roxly handles heating repair throughout the Charlotte metro area.
Offer terms
Limit one coupon per household or business. Valid only toward a completed, qualifying repair — not valid toward the service call or diagnostic fee unless confirmed at time of booking. Offers cannot be combined. Mention this offer when scheduling.
- 30-day labor / 90-day parts warranty
- Findings and an estimate before any repair begins
- Emergency visits available on request
What HVAC customers say
Roman did a great job servicing the AC units at both of our properties. He was professional, honest, and very thorough. He checked everything, explained what he found, completed the maintenance, and gave us useful recommendations. Fair pricing, great service, and easy to work with. We’ll definitely use him again and highly recommend him.AC maintenance
5 stars! Highly recommend! My AC wasn’t working properly, and after several attempts to figure out what was wrong, they came in and got it fixed! I’m so grateful for their knowledge, professionalism, and persistence in resolving the issue. Excellent service and a great experience overall! I would definitely recommend them! Thank you Roman!AC repair
Great experience with this company! Our AC unit broke and they came out the next day. Very professional, friendly office and honest pricing. They got our AC running again quickly and it’s been working perfectly since. Really reliable HVAC company, highly recommend.AC repair
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What this symptom usually means
a heating system that won't produce heat has usually lost its ignition source, its airflow, or the electrical signal that tells it to run. It's rarely a single guaranteed cause, which is why a proper diagnosis matters.
Likely causes
- A failed igniter or pilot assembly. Gas furnaces need a working igniter or pilot to light the burners at all.
- A tripped flame sensor or safety switch. Modern furnaces shut down automatically if they can't confirm a safe flame, which can look like the unit 'not working.'
- A dirty air filter. Severe airflow restriction can trip a high-limit safety switch that shuts the furnace down.
- A failed blower motor. The burners may light, but with no blower running, no warm air reaches the house.
- A thermostat or control-board fault. A wiring or control issue can prevent the call for heat from ever reaching the furnace.
Safe checks you can do first
These are safe for anyone — no tools, gas, refrigerant, or electrical work:
- Swap in a fresh air filter if it's dirty.
- Confirm the thermostat is set to Heat, above room temperature.
- Check the furnace's power switch and the breaker haven't been bumped off.
- For gas units, confirm the gas supply valve is open.
What not to attempt
- Don't repeatedly attempt to relight a gas pilot that won't stay lit.
- Don't bypass a safety switch that's shutting the system down — it's doing its job.
Repair first
Roxly focuses on repair and maintenance of existing residential systems. Most of the causes above are serviceable components — a capacitor, contactor, motor, or coil repair — which is why a proper diagnosis comes before any bigger conversation.
When to call a technician
If the basics check out and there's still no heat, the igniter, flame sensor, blower motor, or control board need a technician's diagnosis. A technician diagnoses the actual fault and reviews findings and an estimate before any work. Service availability may vary by location, equipment type, brand, technician availability, and the scope of the requested work. Listing a city or service on this site does not guarantee same-day arrival. Contact Roxly Appliance & Refrigeration Repair to confirm availability for your address and equipment.
Frequently asked questions
What does it mean when my furnace or heat not working?
a heating system that won't produce heat has usually lost its ignition source, its airflow, or the electrical signal that tells it to run.
Can I fix this myself?
You can safely try the basic checks on this page. Anything involving refrigerant, gas, or internal electrical work should be left to a technician.
Should I call a professional?
If the basics check out and there's still no heat, the igniter, flame sensor, blower motor, or control board need a technician's diagnosis.
What HVAC work does Roxly do?
Roxly diagnoses, repairs and maintains existing residential heating and cooling systems, including seasonal tune-ups.