Keeping your heat pump safe, warm, and working — fast inspections, repairs, and disconnect replacements in Greenville County.
Call Greenville Electric now: 864-757-2012
Serving Greenville, Simpsonville, Mauldin, Travelers Rest, and all of Greenville County, SC.
If you notice a plastic or electrical burning smell coming from outside near your heat pump — or your heat pump stops producing heat — don’t ignore it. A common and dangerous cause is a damaged or melted service/disconnect box at the outdoor unit. Melted disconnects are a sign of overheating caused by high resistance (loose or corroded connections), arcing, or failing internal contacts — and these failures can disable your heat pump and create a fire risk. LunsPro Carolina+1
Faint to strong burning plastic smell when heat mode runs. All Seasons Service Network
Heat pump won’t produce heat or cycles but does not warm the house. LunsPro Carolina
Visible melted or deformed disconnect box, blackened plastic, or discolored wiring. HVAC Talk
Outdoor disconnect feels hot to the touch or has blown fuses repeatedly. JustAnswer
Loose or corroded lugs/terminals — increased resistance produces heat at the connection point. This is the most common cause. HVAC Talk
Defective or worn contacts inside the disconnect (knife/fuse holders) that fail under load. The Inspector's Journal+1
Electrical arcing or misfused circuits — arcing creates localized intense heat and burning/plastic odors. JustAnswer
Overload or wrong fuse/breaker sizing, damaged components, or environmental damage (corrosion/UV) that degrade the disconnect over time. LunsPro Carolina
A melted disconnect is more than an inconvenience — it’s an electrical safety hazard that can prevent your heat pump from working and increase fire risk. The National Electrical Code requires disconnects to be installed within sight and be readily accessible for HVAC equipment; proper installation and a functional disconnect are part of safe, code-compliant systems. Electrical Pro Info+1
We specialize in safe, local repairs and code-compliant replacements for residential heat pump disconnects across Greenville County.
Our service includes:
Immediate safety check — power isolation, visual inspection, and odor/source confirmation.
Thermal & electrical testing — measure connection resistance, lug torque, and thermal imaging when needed.
Replace melted or unsafe disconnects with NEMA-rated, weatherproof disconnects (fused or non-fused as code/installation require).
Tighten and re-torque lugs to manufacturer spec; replace corroded wiring or terminals.
Verify proper fuse/breaker sizing and check for underlying electrical faults that could cause repeat failures.
Recommend upgrades — surge protection, improved enclosures, or relocation if the disconnect is exposed to damage.
We arrive with parts and experience for fast repairs so your heat pump can safely produce heat again.
Licensed electricians experienced with HVAC disconnects and NEC 440.14 requirements. Electrical Pro Info
Fast same-day inspections in most of Greenville County.
Clear safety-first pricing and a one-year labor warranty on our repairs.
Proudly serving Greenville, Simpsonville, Mauldin, Travelers Rest, Fountain Inn and surrounding areas.
If you smell burning plastic, notice a melted disconnect, or your heat pump stopped producing heat — turn off the unit and call a professional now. For fast, safe, code-compliant service in Greenville County, call Greenville Electric at 864-757-2012 or request an inspection online.
Q: Can a melted disconnect cause my heat pump to stop heating?
A: Yes — melted contacts, blown fuses, or internal failures in the disconnect can cut power to compressors or controls and stop a heat pump from producing heat. LunsPro Carolina+1
Q: Is the burning plastic smell always electrical?
A: Often it is electrical (wires, motor windings, arcing) or plastic parts overheating. Any persistent burning/plastic odor during operation should be treated as urgent. All Seasons Service Network
Q: How do you fix a melted disconnect?
A: Stop using the unit, isolate power, and call a licensed electrician/HVAC technician to inspect, test, and replace the disconnect and any damaged wiring or fuses. LunsPro Carolina+1
Q: Will replacing the disconnect stop the problem forever?
A: Replacing a damaged disconnect fixes the symptom — but we always test for the root cause (loose lugs, arcing, wrong fuse size, or failed components) so the failure does not recur. JustAnswer
Call Us Now! 864-757-2012
