At Tony’s Furnace Co., we’ve gathered answers to the most common HVAC questions from Flagstaff homeowners. From furnace repair and A/C service to mini-split installations and tune-ups, these FAQs will help you understand your options and know when it’s time to call a professional.

Yes. We’re a licensed, bonded, and insured HVAC contractor serving Flagstaff and surrounding areas.

Yes. We offer free estimates for new system installations or replacements — not for repair pricing.

Our diagnostic visit is $79. If you choose to move forward with a repair, that fee is applied to the total cost.

Yes, we install ductless mini split systems from trusted manufacturers. Great for garages, additions, or whole-home comfort.

After-hours service is reserved for installations under warranty from Tony’s Furnace Co.. Regular service is available Mon–Fri 8–6 and Sat 9–4.

We check all major components, clean coils, inspect wiring, test pressures and temperatures, and verify performance. See our Services page for full details.

We recommend having your system checked twice a year, in spring and fall, to keep it efficient and reliable

You can replace filters every 1–3 months, clear debris from the outdoor unit, test the thermostat settings, and check for blocked vent

Most systems run effectively for 15–20 years with proper care. Regular maintenance can stretch its lifespan even further

Common causes include a mis-set thermostat, clogged filter, or safety sensor issues. If basic checks don’t help, give us a call

A mild burning smell can be dust from seasonal downtime—just run the system for a few minutes. But if you detect gas, electrical, or musty odors, shut it off and call us right away

Typical repairs run $140–$400, while replacing major parts may reach around $2,000. Preventative tune‑ups (around $120 annually) can help prevent that