Pricebook

No cool, compressor hums and trips, fan won't spin, unit clicks · 5–10 yr (less in hot climates)

Chattering, buzzing, won't pull in, unit runs constantly, pitted or welded contacts · 5–10 yr

High head pressure, trips on high pressure, noisy or grinding, hot to touch, seized · 10–15 yr

Vibration, noise, wobble, cracked hub · 15+ yr

No cooling, hums and trips, grounded or open windings, internal overload cycling, no pressure differential · 12–15 yr

Compressor struggles to start, lights dim on startup, hums before starting · 8–12 yr

Compressor won't start or won't drop out of the start winding · 8–12 yr

Liquid slugging, compressor damage in cold weather · 10+ yr

Nuisance trips, no start, safety lockout · 10+ yr

No heat or no cool in one mode, bleeding through, both modes lukewarm · 12–15 yr

Won't shift modes, no click on changeover · 8–12 yr

Coil ices over, no defrost, defrosts constantly, aux heat runs nonstop · 10–15 yr

Won't initiate or won't terminate defrost · 10–15 yr

Refrigerant leak, formicary corrosion, high head pressure, hail damage · 15–20 yr

Restriction — temp drop across drier, low suction, frost line, poor performance · 10–15 yr

Hunting superheat, starving or flooding coil, iced evaporator, poor capacity · 12–15 yr

Leaks or restriction (rare) · 15+ yr

Slow refrigerant loss at the service ports · 5–10 yr

Leaking at the stem, won't seat · 15+ yr

Intermittent operation, burned lugs, blown fuses · 15+ yr

Standing water, ice in winter, unit out of level · Condition based

No airflow, hums, overheats and trips on thermal, noisy bearings · 10–15 yr

No airflow, motor hunts, starts then stops, error codes · 10–15 yr

Same as ECM motor — the module fails far more often than the rotor · 8–12 yr

Blower hums, won't start, low airflow · 5–10 yr

Low airflow, vibration, whistling, dirt-caked fins, loose set screw · 15+ yr

Refrigerant leak, low capacity, frozen coil, formicary corrosion · 12–18 yr

Superheat hunting, frozen coil, low capacity · 12–15 yr

Rust-through, cracks, standing water, leaks into the ceiling · 15+ yr

Standing water, rust, or missing entirely · 15+ yr

Doesn't shut the system down when the drain clogs → ceiling damage · 5–10 yr

Water overflow, pump runs constantly, won't run, noisy · 5–8 yr

Slow drain, algae clog, missing or wrong trap configuration · Condition based

Air bypass around the filter, wrong size, no gasket · Condition based

No control power, blown fuse, dead thermostat · 15+ yr

System dead, blown from a short · Condition based

No heat, no glow, cracked element, lockout after 3 tries · 3–5 yr

Burners light then shut off after 5–10 sec, repeated cycling, lockout · 5–10 yr

No ignition sequence, no spark, no HSI power · 10–15 yr

No response, erratic operation, blower won't stop, error codes, burned relay · 10–15 yr

Won't ignite, inducer runs but nothing happens, pressure switch open code · 10–15 yr

Same symptoms as switch failure · 5–10 yr

Loud, grinding, won't start, no draft, pressure switch won't close · 10–15 yr

Flue gas leak, pressure switch trouble, CO concern · 10 yr

No gas flow, flow won't stop, wrong manifold pressure, won't modulate · 15–20 yr

Rust, flakes, misalignment, yellow or lifting flame, delayed ignition, rollout · 15–20 yr

Cracks, rust-through, flame disturbance on blower start, CO in supply air · 15–20 yr

Corrosion, leaks, condensate in the cabinet, poor efficiency · 12–18 yr

Furnace cycles on limit, shuts down when hot, no heat · 15+ yr

Manual reset tripped, furnace locked out · 15+ yr

No operation with the panel on, intermittent shutdown · 10+ yr

Pilot won't stay lit · 3–6 yr

Weak or dirty pilot flame, won't hold · 10+ yr

Pressure switch faults, water in the cabinet, blocked with sediment · 5–10 yr

Spent media, acidic condensate corroding the drain · 1–2 yr

Rust, disconnection, wrong slope, spillage, improper termination · 15–25 yr

Rust holes, poor connection, CO risk · 10–20 yr

Air leakage, noise, efficiency loss · Condition based

No aux heat, low output, open element, breaker trips · 15–20 yr

Strips won't energize, won't drop out, one stage dead · 10–15 yr

Nuisance tripping, no heat · 15+ yr

Chattering, welded closed (strips run constantly = huge bills), won't close · 10–15 yr

Inaccurate temp, won't call, staging problems, blank screen, no C-wire · 10–15 yr

Intermittent operation, shorts, corroded or nicked, too few conductors for a new stat · 20+ yr

Zones don't respond, all zones open, damper conflict · 10–15 yr

Stuck open or closed, noisy, no response to a call · 10–15 yr

High static, noise, poor zone control · 15+ yr

Crushed, kinked, torn, disconnected, sagging, insulation degraded · 10–15 yr

Visible gaps, tape failure, disconnections, high leakage · 10–20 yr

Undersized, leaking, no insulation, causing high static · 20+ yr

Undersized returns, no return in bedrooms, closed-door pressure imbalance · Condition based