Fridge and freezer both warm, compressor clicking, or humming without cooling? About 40% of "dead compressor" calls turn out to be a $185–$265 start-relay swap — we diagnose before we quote. When it really is the compressor, we recover refrigerant, install the OEM compressor, pull deep vacuum, and recharge to spec. Part of our full refrigerator repair coverage.
Same-day diagnostic
Call before 2pm weekdays.
EPA 608 certified
R-134a, R-600a, R-410A.
Relay vs compressor first
We diagnose before we quote.
1-yr labor warranty
Written, parts & labor.
Quick answer
Most refrigerator compressor calls in the Twin Cities land in one of three buckets: a $185–$265 start-relay or overload fix (about 40% of calls), a $245–$385 condenser-fan or coil-cleaning fix (about 20%), or a true compressor replacement at $685–$985 on freestanding, $885–$1,150 on out-of-warranty LG linear, or $1,250–$1,950 on Sub-Zero / Viking / Wolf built-ins. We diagnose first, quote in writing, and complete all sealed-system work under EPA Section 608. The flat $149 refrigerator trip fee is credited to whatever repair you approve.
How compressor failure presents
Classic compressor or start-relay failure. The electronics are fine — the sealed system has stopped pumping refrigerant. Food in the freezer slowly warms above 0°F over 12–24 hours while everything else looks normal.
Almost always a failed PTC start relay or overload — the compressor tries to start, fails, trips the thermal overload, cools down, and tries again. Caught early this is a $185–$265 fix; left running it burns the compressor windings.
The compressor is locked (seized piston) or has dead windings. The relay is sending power but the compressor can't turn. Confirmed with a multimeter at the terminal block — three-pin resistance values out of spec mean compressor replacement.
Low refrigerant charge from a slow leak, restricted capillary tube, dirty condenser coil, or early compressor wear. Sealed-system leak search with electronic detector + UV dye finds the cause before any recharge.
LG-specific linear-compressor fault codes. Most LG fridges built since 2014 are still under the 10-year sealed-system warranty — see the dedicated LG linear compressor page for the warranty-claim process.
Written quotes, no surprises
| Repair | All-in range | Notes |
|---|---|---|
| Start relay + overload (PTC) | $185–$265 | The click-click-click pattern caught early. 30–45 min on-site. |
| Condenser fan motor + coil clean | $245–$385 | Compressor was overheating on thermal overload — not the compressor itself. |
| Inverter board (LG / Samsung linear / digital inverter) | $345–$525 | Powers the variable-speed compressor. Common LG failure before the compressor itself goes. |
| Sealed-system leak search + recharge | $485–$785 | Electronic leak detector, nitrogen pressure test, filter-drier, R-134a or R-600a recharge to spec. |
| Compressor swap — freestanding (Whirlpool / GE / Frigidaire) | $685–$985 | Recover refrigerant, braze in OEM reciprocating compressor, 500-micron vacuum, recharge. |
| Compressor swap — LG linear (out of warranty) | $885–$1,150 | If past 10-yr warranty. Within warranty the part is free — labor only $385–$575. |
| Compressor swap — Sub-Zero / Viking / Wolf built-in | $1,250–$1,950 | Built-in sealed system, OEM-only parts, 4–6 hours. Almost always pencils out against $12K+ replacement. |
Ranges include parts, labor, and the $149 refrigerator trip fee (credited to the approved repair). Sealed-system pricing includes EPA 608 refrigerant recovery, filter-drier, evacuation to 500 microns, and recharge to OEM spec.
Brand-specific compressor patterns
LFXS / LMXS / LRMVS / LFXC / LRFVS French-door and column units. Sudden full failure is the dominant pattern — fridge cools fine, next day everything is warm. The 10-year sealed-system warranty covers the part on most fridges built since 2014. See the LG warranty-claim page →
RF / RS / RH / RT French-door, side-by-side, and 4-door Flex units use a variable- speed digital-inverter compressor driven by a dedicated inverter board on the back wall. The inverter board fails earlier than the compressor itself ($345–$525) — always tested first.
WRS / WRF / WRX / KRFF / KRMF / MFI / MFF share the same Embraco or Secop reciprocating compressor family. The PTC start relay is the #1 failure — the click-every-3-minutes pattern is almost diagnostic on its own. Caught early, the relay swap saves the compressor for $185–$265.
BI-36 / BI-42 / BI-48 / IC-27 / IC-30 / 600 / 700 built-ins use a dual-evaporator sealed system with a heavier-duty compressor than freestanding units. Failures trend toward condenser-side overheating at year 12–18, magnetic door-seal degradation pulling extra runtime, and (less often) a true compressor swap. Almost always worth repairing — the unit is part of a $12K–$25K install.
Standard reciprocating compressors with PTC start relays — same diagnostic playbook as the Whirlpool family. GE Profile French-doors trend toward the "running constantly" pattern (slow refrigerant leak) before a true compressor failure; Frigidaire FFSS / FGHB side-by-sides trend toward the start-relay click pattern.
The diagnostic order
Pull the fridge out 6 inches. With the door closed, listen for the compressor hum and the condenser fan. Silence at the back = relay, fan, or compressor. Hum + no cold = sealed-system or compressor.
A coil packed with dust or pet hair makes the compressor overheat and trip on thermal overload — exact same symptom as a dead compressor. Vacuum the coil, wait 4 hours, retest before any teardown.
If the compressor hums but the fan is silent, the fan motor has failed. $245–$385 fix; do not skip — running a compressor without condenser airflow will kill it within days.
Unplug the fridge, pop the access panel, and remove the relay from the compressor terminal block. A failed PTC measures open or shorted. $185–$265 fix and a common false-positive for compressor failure.
With the relay off, meter common-to-start, common-to-run, and start-to-run pins. Out-of-spec values (or open windings) mean the compressor itself is dead — proceed to sealed-system replacement quote.
Only after these five checks narrow the fault to the sealed system do we recover refrigerant and open the lines. This is the difference between a $215 repair and an unnecessary $985 compressor swap.
FAQs
On a standard freestanding refrigerator (Whirlpool, KitchenAid, Maytag, GE, Frigidaire, most Samsung), a sealed-system compressor swap runs $685–$985 all-in including EPA-certified refrigerant recovery, OEM compressor, filter-drier, deep vacuum, and recharge. On an LG with the linear compressor and within the 10-year sealed-system warranty, the part is covered by LG — your out-of-pocket is the labor only at $385–$575. On a Sub-Zero, Viking, or Wolf built-in the same job runs $1,250–$1,950 because the parts are OEM-only and the job runs 4–6 hours. About 40% of calls that sound like a dead compressor turn out to be a $185–$265 start-relay swap — we diagnose first.
A failing PTC start relay clicks every 3–5 minutes (the compressor tries to start, fails, trips the overload, cools down, tries again). The compressor itself stays mostly quiet — no sustained humming, no vibration. A dead compressor will hum loudly for 10–15 seconds and then trip out on overload, or stay completely silent with no click pattern. Either way the tech confirms with a multimeter at the compressor terminal block — three-pin resistance values out of spec mean compressor replacement. The relay is a $185–$265 repair; the compressor itself is $685+.
Three conditions need to be true on a standard freestanding fridge: the box is under 8 years old, the cabinet/interior is in good shape, AND the repair quote is under half the replacement number. On a 12-year-old $1,200 box a $985 compressor swap rarely pencils — we'll say so in writing. On a Sub-Zero, Wolf, Thermador, or Viking built-in the math flips completely: replacement runs $8K–$25K plus cabinetry rework, so sealed-system work at $1,250–$1,950 is almost always the right call. LG fridges within the 10-year linear-compressor warranty are also a clean repair — the part is free.
Reciprocating compressors (Whirlpool, KitchenAid, Maytag, GE, Frigidaire, most Samsung) use a piston driven by a rotary motor — louder click on startup, longer average life, and the #1 failure mode is the cheap PTC start relay rather than the compressor itself. Linear compressors (LG, Kenmore Elite built by LG, some Samsung digital-inverter units) use a magnetically driven piston — quieter, more efficient, but failures almost always mean a full compressor replacement (not a start relay). LG's 10-year sealed-system warranty exists specifically because the linear-compressor failure rate ran higher than expected on 2014–2019 builds.
Freestanding refrigerators: 3–4 hours on-site once the part is on the truck. Sub-Zero and Viking built-ins: 4–6 hours, often split across two visits because the fridge has to be pulled, set on protective skids, and the sealed system pulled to deep vacuum (500 microns) before recharge. Add 1–3 business days if the OEM compressor has to be ordered. We return at 24 hours after install to verify sustained pull-down on every sealed-system job.
Yes — all our techs are EPA Section 608 Universal certified, which is required for any refrigerant recovery, evacuation, and recharge. We do not sublet sealed-system work and we never vent refrigerant. Every sealed-system job records recovery and recharge weights, replaces the filter-drier, and pressure-tests with nitrogen before commissioning. The flammable R-600a isobutane charge used on most post-2018 fridges requires the right recovery equipment and brazing technique — not a job for general handymen.
We carry start relays, overloads, condenser fan motors, inverter boards, and filter-driers on every truck — that handles the 60% of "compressor" calls that aren't actually the compressor. Replacement compressors are model-specific and ordered after diagnosis (usually 1–3 business day arrival from OEM distributors in Minneapolis). LG warranty compressors ship from LG in 3–7 business days after we file the claim.
1-year written parts-and-labor warranty on every repair we approve. On an LG warranty compressor the part carries the remainder of LG's 10-year sealed-system warranty in addition to our 1-year labor warranty. If the same failure returns inside 12 months we come back free — no second trip fee, no second labor charge.
Yes — light commercial refrigeration (restaurant prep tables, reach-ins, walk-in evaporators, deli cases) is a regular part of our work. Compressor failures on commercial equipment are quoted in writing after diagnosis; we carry common condenser fans and contactors on the truck and order OEM compressors for the specific unit.
Same-day diagnostic windows across the Twin Cities when you call before 2pm on a weekday. If your fridge stopped cooling overnight, perishable food held above 40°F for more than 2 hours should be discarded (see FoodSafety.gov). Call as soon as you notice the freezer slipping above 0°F.
