- HEP Heat and Air
- Service Truck

Service Truck
Service Truck | Heating and Air Conditioning | Signal Mountain
When the peaks of Signal Mountain call for comfort, HEP answers with a fleet of fully stocked service trucks ready to roll at a moment’s notice. Each truck is a mini–warehouse on wheels—packed with OEM parts, smart diagnostic tools, and the experience of certified technicians who know this terrain as well as they know HVAC schematics. From historic cabins to modern hilltop homes, we arrive fast, greet you with a smile, and get right to work so your downtime stays as short as our mountain roads are winding.
Our team handles everything involving heating and air conditioning, whether it’s an emergency repair during a sudden cold snap, a routine tune-up before summer’s peak, or a full system upgrade that boosts efficiency year-round. Transparent pricing, tidy workspaces, and satisfaction guarantees come standard; the only surprise you’ll feel is how quickly comfort returns once HEP’s truck pulls into your driveway.
FAQs
What types of truck HVAC systems do you service in Signal Mountain?
We repair, maintain, and replace heating and air-conditioning components on light-, medium-, and heavy-duty trucks, including pickups, box trucks, semis, delivery vans, and specialized service vehicles. Our technicians are trained to work on factory-installed systems as well as aftermarket units, auxiliary bunk heaters, and rooftop A/C pods.
Do you offer mobile HVAC service, or do I have to bring my truck to your shop?
For your convenience, we provide full mobile service throughout Signal Mountain and the greater Chattanooga area. Our fully stocked service trucks carry refrigerant, compressors, blower motors, heater cores, hoses, belts, and diagnostic equipment, allowing most repairs to be completed on-site at your yard, jobsite, or along the roadside. If a repair requires a lift or extensive teardown, we can tow the vehicle to our facility.
How fast can you respond to an emergency heating or A/C breakdown?
During regular business hours we typically arrive within 60–90 minutes anywhere on Signal Mountain. After-hours emergency service is available 24/7 with average response times of two hours or less. Because our dispatch center monitors local traffic and mountain weather conditions, we’ll give you a real-time ETA and keep you updated until our technician arrives.
What brands and parts do you keep on your service trucks?
Our trucks are stocked with OEM-grade and premium aftermarket components from Sanden, Denso, Red Dot, Bergstrom, Valeo, and Carrier-Transicold. We also carry universal fittings, O-rings, refrigerants (R-134a, R-1234yf, and R-12 substitutes), and heater hose in multiple diameters. Keeping these parts on hand allows us to complete more than 85 % of repairs in a single visit.
How much does a typical truck A/C recharge or heater repair cost?
Pricing varies by refrigerant type and the amount required, but a standard R-134a evacuation, leak test, and recharge for most medium-duty trucks starts at $189, parts and labor included. Minor heater repairs such as blend-door adjustments or hose replacements range from $120 to $250. You’ll always receive a written estimate before work begins, and we never charge mileage fees for service calls inside Signal Mountain.
Can you upgrade older trucks with modern climate-control features?
Yes. We offer retrofit packages that add high-output compressors, electronic thermostats, and dash-mounted A/C vents to vintage or vocational trucks that originally lacked robust climate control. Options include conversion from R-12 to environmentally friendly refrigerants, auxiliary cab heaters for winter on the mountain, and auxiliary condensers for improved cooling during hot Tennessee summers. All retrofits meet DOT safety standards and come with a 24-month parts and labor warranty.