- HEP Heat and Air
- Emergency Support

Emergency Support
Emergency Support | HVAC Unit Replacement | Heating and Air Conditioning | Greeneville
When your system crashes during a muggy summer night or a frosty Appalachian morning, HEP’s emergency team in Greeneville is ready to roll 24/7. Our certified technicians arrive fast, diagnose precisely, and offer transparent solutions that fit your home and budget. From securing temporary comfort with portable units to handling complex electrical or refrigerant issues, we treat every call with the urgency it deserves—because we know a broken HVAC isn’t just inconvenient; it can put your family’s health at risk.
If repair isn’t the safest or most economical option, we make the transition to a full HVAC unit replacement seamless. HEP’s pros measure your home’s exact load requirements, guide you through high-efficiency models, manage permitting, and install your new system the same day whenever possible. You’ll feel the difference in comfort, air quality, and energy savings immediately, all backed by Greeneville’s strongest warranties and our promise of honest, neighbor-style service.
FAQs
How do I know if my HVAC unit needs emergency replacement instead of a repair?
Several warning signs indicate a full replacement is the safest and most cost-effective solution: 1) The system is 12–15 years old and has already required multiple major repairs; 2) The compressor, heat exchanger, or blower motor has failed—components that often cost half the price of a new system; 3) Energy bills have spiked, suggesting severe efficiency loss; 4) Uneven temperatures, loud grinding or banging noises, or a burning smell are present. In an emergency visit, our Greeneville technician will perform a full diagnostic, show you the repair vs. replacement cost comparison, and help you decide whether continuing repairs makes sense or if a new unit will save you money long-term.
What should I do if my HVAC system breaks down after business hours in Greeneville?
Call our 24/7 emergency hotline immediately. A live dispatcher (not an answering service) will gather basic information and dispatch the on-call technician, who typically arrives within 60–90 minutes anywhere in Greeneville or Greene County. While you wait, turn off the system at the thermostat and breaker, and avoid using space heaters or open-flame appliances for safety. Our trucks are stocked with common replacement parts and temporary heaters/coolers so we can stabilize your home environment even if a full unit swap must wait until morning.
How quickly can you replace an HVAC unit in an emergency?
If the unit is in stock locally, we can often perform same-day removal and installation. For most common sizes (2–5 ton split systems, gas furnaces, and heat pumps), we maintain inventory at our Greeneville warehouse. We complete the permit application electronically with the city/county and can start work as soon as approval is issued—usually within a few hours. From arrival to final startup, a standard replacement takes 4–8 hours. If a special-order unit is required, we provide temporary heating or cooling solutions until the new system arrives.
What brands and system types do you install for Greeneville homeowners?
We are certified dealers for Trane, Rheem, Goodman, and Carrier, and we service all other major brands. Available options include high-efficiency gas furnaces, all-electric heat pumps, dual-fuel hybrid systems, and ductless mini-splits for additions or bonus rooms. Our comfort advisor will perform a Manual J load calculation to ensure the new unit is properly sized for Greeneville’s climate and your home’s insulation, window orientation, and ductwork layout.
How much does emergency HVAC replacement cost, and do you offer financing?
Pricing varies according to system size (tonnage/BTU), efficiency rating (SEER2/HSPF), refrigerant type, and installation complexity. In Greeneville, a typical 3-ton 15-SEER2 heat pump replacement runs $6,500–$8,500 installed, while a high-efficiency 20-SEER2 inverter system may cost $10,000–$13,000. We offer 0% APR financing for up to 18 months (OAC) and longer-term low-interest plans, plus we guide you through available TVA rebates and federal tax credits of up to $2,000 under the Inflation Reduction Act.
Will my new HVAC system be energy-efficient and protected by a warranty?
Yes. All units we install meet or exceed the latest Department of Energy efficiency standards for the Southeast region. High-efficiency models can lower your utility bills by 20–40% compared to equipment from 10–15 years ago. Each system includes a 10-year factory parts warranty and a one-year labor warranty, with extended labor coverage up to 10 years available. We also register the equipment on your behalf with the manufacturer to ensure full warranty benefits and schedule a complimentary one-year performance check to keep the system running at peak efficiency.