Appliance Part Replacement Costs: Drain Pump, Inlet Valve, Thermistor & Control Board (Section C)
Part replacement cost = the part + the labour to reach it, and the second half varies more than the first. This guide profiles the four parts owners ask about most — drain pump, inlet valve, thermistor, control board — what drives each one's total, and the checks that confirm you actually need it (because the cheapest repair is the one you don't buy by mistake).
Drain pump
The part itself is usually one of the cheaper powered components; totals are driven by access (front-flap vs. machine-tilting) and whether diagnosis time is included. Confirm need: filter/hose clear, pump silent or humming-jammed, continuity open or impeller stripped. Labour is typically the smaller half of this job — it's a 'worth fixing' staple.
Water inlet valve
Similarly modest as a part (one assembly carries both solenoids on most washers). The confirmation that saves money: screens cleaned and taps proven BEFORE the valve is condemned — a large share of 'bad valves' are clogged screens. A valve passing water while the machine is off is the exception that skips all queues: replace promptly (flood risk).
Thermistor / temperature sensors
The cheapest parts on this page and the most mis-sold: sensor codes are as often connectors and harnesses as sensors. A meter reading at the sensor, compared against the manufacturer's published specification for that model where the maker gives one, should precede any purchase. Labour is small; diagnosis is the value.
Control board
The expensive end: boards are model-specific, priced accordingly, and often non-returnable — which is why board replacement should be the END of a diagnosis (everything else proven), never the start. Ask the technician what was ruled out before the board; a good answer names the tests. Board totals on older appliances are where the 50%-of-replacement rule bites hardest.
How to read any part quote: three lines, not one number
Every professional quote for the four parts on this page is really three separate charges wearing one total, and the split explains most of the spread between quotes for the identical job. The first line is the part itself, bought against your appliance's exact model number. The second is labour, and published rate data shows why it moves so much: Angi's 2026 washing machine figures put technician labour at roughly fifty to one hundred and fifty dollars an hour, while its dishwasher figures put labour at roughly seventy-five to one hundred and twenty-five an hour, with metropolitan rates above rural ones and travel or access difficulty adding time rather than a different rate. The third line is the diagnostic or minimum service fee — Angi puts washer diagnostic fees at roughly fifty to one hundred dollars and dishwasher minimum fees at roughly fifty to eighty dollars — which many firms credit toward the repair if you proceed with the same company, and which you pay outright if you decline. That crediting policy is the single most useful question to ask before the visit, because it decides whether a second opinion costs you a second fee. Read every range on this page as part plus labour plus that fee structure, for a typical model, in a typical market; premium brands, built-in or stacked installations, and after-hours calls all push a real quote toward the top of a range or beyond it, and none of the ranges here is a quote for your machine.
Drain pump replacement cost, in full
Of the four parts in this guide, the drain pump has the widest published spread, because it lives in two different appliances with two different access stories. For a washing machine, Angi's 2026 repair table puts pump replacement at one hundred and fifty to four hundred dollars all-in, and its symptom guidance matches the diagnosis on this site: water left standing in the drum, unusual noises from underneath, or a drain error code are the pump's calling cards. An itemised regional cost table read alongside it splits the same job into a pump at thirty to one hundred dollars plus one hundred to one hundred and fifty dollars of labour, for a total of one hundred and thirty to two hundred and eighty dollars — lower than Angi's ceiling because it assumes a standard brand and straightforward access, which is exactly the assumption to check on your own quote. For a dishwasher, Angi puts pump replacement at one hundred and fifty to three hundred and fifty dollars, with drainage-issue repairs more broadly at one hundred to two hundred and fifty. The drivers, in order, are access (a washer pump reached through a front panel is a shorter job than one that needs the machine tipped or the tub supported), whether the pump failed alone or took a hose, seal or filter housing with it, and brand: widely distributed makes carry cheaper pumps than premium or discontinued models, a pattern Angi names explicitly for both appliances. Confirm the need before paying for any of it — filter and hose clear, impeller free or visibly damaged, motor silent or humming without turning — because a large share of drain faults are blockages wearing a pump's symptoms, and a blockage costs cleaning time, not a part.
Water inlet valve replacement cost, in full
The inlet valve is the most consistently priced job on this page, and the published figures from independent sources agree closely enough to budget by. Angi's 2026 washing machine table puts water inlet valve replacement at one hundred and twenty to two hundred and fifty dollars total, describing the symptoms as a machine that does not fill, fills slowly, or overflows, and naming mineral buildup and mechanical wear as the usual failure routes. The itemised regional table lands in the same place by a different route: a valve at twenty to sixty dollars plus one hundred to one hundred and fifty dollars of labour, totalling one hundred and twenty to two hundred and sixty dollars. A dishwasher cost breakdown read for this guide classes the inlet valve in its minor-repair tier — roughly one hundred and fifty to three hundred dollars installed alongside door latches and dispensers, with the valve itself at about one hundred and fifty dollars fitted on a typical job — the higher floor there reflecting minimum labour charges rather than a pricier part. Three drivers move a real quote inside those bands. First, configuration: most modern washers carry hot and cold solenoids on one assembly, so one part price covers both, while some dishwasher valves integrate floats or brackets that raise the part line. Second, water quality: in hard-water districts the valve is often condemned alongside scaled hoses and screens, and the honest quote includes them. Third, urgency: a valve that passes water while the machine sits off is a flood risk, and an emergency or same-day call legitimately costs more than a scheduled one. The money-saving confirmation from the base guide still governs all of it — screens cleaned and both taps proven open before the valve is blamed — because a clogged inlet screen produces the identical slow-fill symptom for the price of a rinse under a tap.
Thermistor replacement cost: a cheap part wearing a diagnostic bill
The thermistor — the temperature sensor called an NTC on many European models — is the clearest case on this page of the part being the smallest line on the invoice. Genuine manufacturer sensors are commodity-priced: OEM parts listings read for this guide show a GE refrigerator temperature sensor at about thirty-five dollars, a Samsung refrigerator temperature sensor at about thirty-nine dollars, a Frigidaire thermistor kit at about thirty dollars, and a Whirlpool refrigerator sensor just under sixty dollars, while a repair-guide source prices a dishwasher's NTC sensor part in the same low tens-of-dollars territory. What a professional replacement actually costs is set by everything around the part. Angi's 2026 dishwasher table is the closest published category: sensor repair, covering cycle and water sensors, runs one hundred to two hundred dollars — a range that is mostly the service fee and the labour to reach a sensor that may sit in the sump, the door, or behind a panel, plus the testing time to prove the sensor and not its harness is at fault. That testing is where the value sits, and it is also where money gets wasted in the other direction: sensor error codes are raised by corroded connectors, chafed harness wires and failing control inputs as well as by dead sensors, so a quote that replaces the thermistor without a meter reading taken at the sensor — compared against the manufacturer's published specification for that model, where the maker gives one — is buying a guess. Expect the honest version of this job to sit inside the published sensor range for common models, to rise for sealed or hard-to-reach placements such as some refrigerator and freezer sensors, and to fall to little more than the part price for a confident DIY swap on an accessible dishwasher or dryer sensor — with the standing warning that a misdiagnosed sensor returns the original fault plus the cost of the part.
Control board replacement cost: the expensive end, priced honestly
A control board is the one part on this page where the part itself, not the labour, dominates the bill — boards are model-specific electronic assemblies, priced accordingly, and frequently sold on restricted-return terms, which is why every source read for this guide places board work at the top of its repair table. Angi's 2026 figures put washing machine control board repair at two hundred to five hundred dollars and dishwasher control board replacement at two hundred to four hundred dollars. The itemised regional washer table agrees from the parts side: a main board at one hundred to three hundred dollars plus one hundred and thirty to one hundred and ninety dollars of labour, totalling two hundred and thirty to four hundred and ninety dollars for standard brands. A dishwasher breakdown read alongside them puts board labour alone in the mid-hundreds on some providers and a completed board replacement above four hundred dollars, inside a major-component tier of roughly three hundred to six hundred and fifty dollars that it shares with circulation and drain pumps — the premium-brand, built-in end of the market. The drivers are stark. Board price climbs with model sophistication (inverter motor drives, steam and smart features all live on or beside the board), with brand tier, and with scarcity on discontinued models. Labour climbs when a second board — a separate user-interface panel — has to be ruled in or out alongside the main board. And the diagnostic stakes are highest here: a board condemned without the loads it drives being tested first (pump, valve, heater, motor, sensors) can leave the original fault untouched while consuming the largest cheque in domestic appliance repair. The question that protects you is the one in the base guide: ask what was tested and ruled out before the board, and expect named tests, not impressions.
Why the same part costs different money in different kitchens
Owners comparing quotes — or comparing a neighbour's bill with their own — usually find four legitimate drivers behind the differences, and knowing them keeps a fair quote from looking like a rip-off and an inflated one from hiding among them. Brand and model come first: published cost guides for both washers and dishwashers state plainly that widely available makes carry cheaper parts, that premium and imported brands require pricier components and sometimes specialist technicians, and that discontinued models can be expensive simply because the part is scarce. Access comes second: the identical pump swap takes measurably longer in a stacked laundry pair, a built-in dishwasher with custom panelling, or a machine that must be pulled from a tight closet, and labour is billed by time. Region comes third: the labour bands in the published data are national, and the same sources note metropolitan rates running higher and rural jobs attracting travel charges. Timing comes fourth: emergency and after-hours attendance carries explicit surcharges in the published dishwasher data, on top of standard rates. What should not move a quote is vagueness — a legitimate estimate names the part by the model number it was ordered against, separates part, labour and diagnostic fee, and states whether the fee is credited. A single unexplained total, especially for a board, is the one pattern on this page that should reliably send you to a second quote, accepting that the second opinion may itself carry a diagnostic fee if it comes from a different firm.
Doing it yourself versus paying for the visit
The parts on this page split cleanly by DIY sense, and the published data prices both routes. Angi's washer guidance puts DIY repair spending at roughly the cost of parts — twenty to one hundred and fifty dollars across common jobs — against professional totals of one hundred to four hundred dollars and up, and its dishwasher guidance makes the same point in labour terms: doing the work yourself avoids seventy-five to one hundred and twenty-five dollars an hour, while the parts themselves run from about ten dollars for small seals to three hundred dollars for major components. Against that saving stand three real costs. The first is diagnosis: the professional ranges above buy a tested conclusion, and a DIYer who swaps a pump for what was actually a blockage, or a board for what was actually a sensor harness, has spent part money without buying the answer. The second is risk: inlet valves and pumps are water parts fitted beside electrical parts, and a leaking DIY refit can convert a two-hundred-dollar repair into water damage that dwarfs it — the sources read for this guide raise exactly that caution. The third is warranty: work inside a machine still under a manufacturer's or extended warranty can void the coverage that would have paid for the job. The sensible line the data supports: cleaning, screens, filters and access-panel sensor swaps on out-of-warranty machines are reasonable DIY territory; board replacement and any job whose diagnosis you cannot meter-test belong to a professional visit, where the diagnostic fee is buying certainty as much as labour.
Repair or replace: running the fifty-percent rule on real numbers
Every cost source read for this guide converges on the same decision rule, and this page's four parts show why it works. Angi states it for both appliances in near-identical terms: if a repair costs more than about half the price of a comparable new machine, replacement usually wins — with new washers starting, in its worked example, around five hundred to twelve hundred dollars and new dishwashers, installed, around five hundred to thirteen hundred dollars, against average repairs near two hundred and twenty to two hundred and twenty-five dollars. Run the four parts through it. A drain pump or inlet valve inside its published band almost always clears the rule comfortably on a machine under eight to ten years old, which matches Angi's age guidance that younger machines with a single moderate repair deserve fixing. A thermistor job, being mostly diagnosis, clears it more easily still — provided the diagnosis is real. A control board at the top of its band is where the rule bites: on an older washer or a budget dishwasher, a four-to-five-hundred-dollar board total can exceed half the replacement cost before you add the machine's other wear, and the correct comparison is not board-versus-new but board plus likely next failures versus new. Two adjustments keep the arithmetic honest. Count the diagnostic fee you have already paid as spent either way, not as a reason to proceed. And price the replacement properly — delivery, installation and disposal included, as the dishwasher figures do — because comparing a repair total against a bare shelf price rigs the decision toward replacing. Done that way, the rule does what this whole guide exists to do: it turns four very different parts into one calm, numbers-first decision.
Key takeaways
- Diagnostic fees credited toward repair are standard practice — confirm the policy before the visit.
- For any part: the model number from the appliance's rating label is the only safe way to order.