- HEP Heat and Air
- Aging Furnaces

Aging Furnaces
Aging Furnaces | Heat Repair | Heating and Air Conditioning | Corryton
When icy winds whip through Corryton and your aging furnace refuses to cooperate, HEP’s seasoned technicians arrive with the tools, parts, and know-how to deliver fast, no-nonsense heat repair. We diagnose everything from sputtering pilot lights to worn blower motors on the spot, restoring warmth while protecting your family from costly breakdowns and frozen-pipe headaches. Because we handle heating and air conditioning as a single, integrated system, our crew also checks airflow, duct integrity, and thermostat accuracy—so the fix you get today keeps performing long after winter bows out.
As a hometown company, HEP backs every service call with transparent pricing, industry-leading warranties, and a reputation built on decades of five-star reviews across Knox County. Whether your furnace needs a simple part replacement or a full rejuvenation, we arrive when promised, leave your home cleaner than we found it, and explain energy-saving options that can trim future utility bills. Trust the local pros who treat Corryton neighbors like family and refuse to leave you in the cold.
FAQs
How can I tell if my aging furnace in Corryton needs repair or full replacement?
Watch for warning signs such as uneven heating, loud rattling or banging noises, cycling on and off more often, unexplained increases in utility bills, or a yellow instead of blue burner flame. If the unit is over 15-20 years old and repairs exceed roughly 30% of the cost of a new system, replacement is usually the more economical choice. We can provide a free in-home assessment to help you decide.
Why is my older furnace blowing cold air even though the thermostat is set to ‘heat’?
Common causes include a malfunctioning ignitor, dirty or misaligned burners, a faulty limit switch, or a clogged air filter that triggers safety shut-downs. In Corryton’s humid climate, condensation can also corrode heat-exchanger surfaces and affect burner performance. Our technicians carry the most frequently needed parts on the truck to restore warm airflow on the first visit whenever possible.
What is the average lifespan of a furnace in Corryton, and how can regular maintenance extend it?
Natural-gas and electric furnaces typically last 15–20 years in East Tennessee. High humidity and occasional extreme temperature swings can shorten that span if the system isn’t serviced. Annual tune-ups—cleaning burners, checking heat exchanger integrity, lubricating motors, and calibrating controls—can add 3–5 years of reliable service while keeping energy costs lower.
Are there energy-efficient upgrade options that still work with the ductwork in my older home?
Yes. Today’s high-efficiency 2-stage and modulating gas furnaces (up to 97% AFUE) and variable-speed air handlers are designed to fit standard duct systems. In some cases, we may recommend minor duct sealing or adding returns for optimal airflow, but a complete redesign is rarely necessary. We’ll run a load calculation to verify compatibility before any installation.
How fast can you respond to no-heat emergencies in the Corryton area during winter?
We offer 24/7 emergency service with a guaranteed 2-hour response window for Corryton and surrounding communities. Our on-call technicians carry space heaters for immediate comfort and have access to our parts warehouse after hours, ensuring most heat-loss situations are resolved the same day.
What should I do before the technician arrives to speed up the repair process?
1) Turn off the furnace at the thermostat if it’s making unusual noises or smells. 2) Check and document any error codes flashing on the control board. 3) Clear a 3-foot workspace around the furnace and ensure pets are secured. 4) Have your last maintenance records handy. These steps help our technician diagnose and fix the problem faster, saving you time and labor costs.