Decision guide
Repair or replace a microwave
This is the appliance where the honest answer is usually that the maths does not work, and the page below shows exactly how badly. A mainstream microwave is among the least expensive appliances priced here, which puts the replace threshold below the cost of most repairs before a technician has driven anywhere. The one thing that reverses the answer is not the fault — it is whether the unit is built in.
- Replace above
- $125
- New unit
- $250
- Expected life
- 9 yr
- Ceiling at 5 yr
- $53
- Repairs priced
- 7
Two numbers, and they are not the same number
Every repair-or-replace answer is one of two tests. One is fixed against the price of a new unit and never moves. The other falls every year you own the appliance.
The fixed rule
$125
Half the price of a new microwave
If the repair quote is more than half the price of an equivalent new unit, replacement is usually the better spend. Below half, repair almost always wins on cost per remaining year of service.
Of the 7 microwave repairs priced below, 0 fall entirely under this line, 3 straddle it and 4 sit entirely above it.
The rule that moves
$26
Half of what a 9-year-old one is worth
The stricter version is to spend no more than half of what the appliance is worth today, which is the ceiling the value estimator returns. At age zero the two rules give exactly the same number, because a brand-new unit is worth what a new unit costs. Every year after that they diverge: the price of a replacement stays where it is while the value of yours falls.
A microwave sits on this site's fast depreciation curve, so the ceiling falls from $125 when new to $53 at 5 years and $26 at 9.
Then check the age against expected lifespan. An appliance past roughly three-quarters of its expected life has little runway left to earn back a large repair, so the threshold drops as the machine gets older — on an old unit, a repair at a third of new price can still be the wrong call.
Every microwave repair, judged both ways
7 priced microwave repairs, from turntable motor or coupler at $80–$160 up to control board or touchpad at $180–$350. The last column is the last whole year at which the typical quote for that job still sits under the ceiling.
| Repair | Typical quote | vs $125 | Pays back through |
|---|---|---|---|
| Turntable motor or coupler | $80–$160 | Straddles | New only |
| Door interlock switch set | $100–$200 | Straddles | Never |
| Line fuse plus the interlock that blew it | $100–$200 | Straddles | Never |
| Vent fan motor (over-the-range) | $150–$300 | Over | Never |
| High-voltage diode or capacitor | $150–$280 | Over | Never |
| Magnetron replacement | $150–$350 | Over | Never |
| Control board or touchpad | $180–$350 | Over | Never |
"Under" is a band wholly below $125, and nothing here qualifies. "Straddles" is a band that crosses it, so where your quote lands inside them is the decision — turntable motor or coupler, door interlock switch set and line fuse plus the interlock that blew it. "Over" means the cheapest version of the job already exceeds the line: vent fan motor (over-the-range), high-voltage diode or capacitor, magnetron replacement and 1 other. The pays-back column applies the stricter test to the midpoint of each band. None of this includes the diagnostic fee, which is charged for the visit and the diagnosis whether the verdict is good or bad. Many shops credit it against the repair if you approve the work the same day and many do not, so ask before the van is dispatched rather than after.
What replacing a microwave is priced at here
These 1 lines are not repairs, so they are not judged against a replace threshold — they are what the other side of the decision actually costs once fitting is included. That is the honest comparison for this appliance, and it is a different number from the $250 the thresholds above are built on.
| Replacement or installation | Typical cost |
|---|---|
| Full over-the-range replacement and refit | $400–$900 |
What makes this decision different on a microwave
The method is the same on every appliance. What is not the same is which faults are expensive, what replacement actually involves, and how long the machine has left to earn a repair back.
Everything about this decision turns on countertop versus over-the-range, and it turns on the replacement side rather than the repair side. The repairs cost roughly the same either way. What differs is what replacing means: a countertop unit is unplugged and carried out, while an over-the-range unit is mounted to a bracket and through the cabinet above, ducted, and wired, and getting a new one in takes two people and a matching cabinet opening. That is why the same magnetron fault is a throwaway on one and a sensible repair on the other.
Repair wins
A built-in or over-the-range unit with a fault outside the high-voltage section
A turntable coupler, an interlock switch, a line fuse or a vent fan motor on a unit that is expensive to replace is a repair worth making, because you are comparing it against a job that includes ducting and cabinet fitting rather than against a box on a shelf. The coupler is the standout: a plate that wobbles or stops turning reads as a failed motor, and the plastic coupler underneath splits far more often.
Replacement wins
Any high-voltage fault on a countertop unit
A magnetron, a diode or a control board on a countertop microwave costs more with labour attached than the appliance is worth new, and that is true on day one, not only when it is old. Arcing damage to the cavity walls is a replace at any age because it cannot be safely repaired. So is a damaged door, hinge or latch — a compromised door seal is a containment issue rather than a cosmetic one.
The argument nobody makes for you
What breaks next on a microwave
Over-the-range units run hot above a cooktop and their grease filters are the most neglected consumable in the kitchen, so what follows one repair is usually another heat-and-grease failure: the vent fan motor, the touchpad membrane, or the interlocks in a door that has been slammed for years. On a countertop unit there is rarely a second repair, because there is rarely a first.
What a microwave is worth, and what that buys
Five points across a 9-year expected life, on the fast depreciation curve this site assigns a microwave. Value is what the estimator returns for a mainstream unit of that age, the ceiling is half of it, and the last column counts how many of the 7 priced microwave repairs still sit under it.
| Age | Estimated value | Repair ceiling | Model verdict | Repairs still clearing |
|---|---|---|---|---|
| 1 yr | $210 | $105 | Repair | 0 of 7 |
| 2 yr | $176 | $88 | Repair | 0 of 7 |
| 5 yr | $105 | $53 | Repair | 0 of 7 |
| 7 yr | $74 | $37 | Borderline | 0 of 7 |
| 9 yr | $52 | $26 | Replace | 0 of 7 |
How to read this
Every ceiling on this page is half the value the estimator gives a unit of that age in excellent condition. Excellent is deliberately the generous end of the model — it values the appliance as it will be once the fault is fixed, which is what the repair is actually buying. Rate your own unit honestly in the estimator and every figure here moves down.
Where the verdict flips
The model stops recommending repair outright at year 6 and starts recommending replacement at year 8. The last column tells a blunter story: on a $250 appliance the ceiling drops under the cost of a visit almost immediately, so nothing on the repair menu clears it once the unit is out of its first year. There is a harder limit here than either rule: from year 7, the bottom of the $40–$80 diagnostic fee is more than the entire repair ceiling. At that point you are being asked to spend more finding out what is wrong than the rule says the fix is worth.
What the brand does to the line
Brand does exactly one thing in this model: it moves the price of a comparable new unit, which moves the threshold with it. It does not change the expected life of a microwave and it does not change the depreciation rate.
| Price tier | Multiplier | New unit | Replace above | Dearest repair |
|---|---|---|---|---|
| Budget | ×0.70 | $175 | $88 | Over |
| Mid-range | ×1.00 | $250 | $125 | Over |
| Premium | ×1.50 | $375 | $188 | Straddles |
| Luxury | ×2.20 | $550 | $275 | Straddles |
The last column takes the dearest microwave repair priced on this site — control board or touchpad at $180–$350 — and asks where it lands against each tier's threshold. Tiers are typical retail positioning applied uniformly across every appliance type by this site's value model; not every tier is well represented in every category, and a brand the model does not recognise is treated as mid-range. This is also the reason a built-in or premium microwave is worth repairing at prices that would total a mainstream one — the appliance you are being compared against costs more.
What replacing a microwave costs that the sticker does not
Every threshold on this page is built from $250 for the appliance, and this is the one appliance where the site prices the fitted job too — full over-the-range replacement and refit at $400–$900. The gap between those two figures is the argument.
For a countertop unit, replacement costs the sticker price and nothing else, which is precisely why repair loses. For an over-the-range unit it is a genuine installation: the mounting bracket and the cabinet template have to match, the duct has to be configured for the direction the existing run goes, and the exhaust may need converting between rear, roof and recirculating. A mismatch turns an appliance swap into cabinetry work.
- Cabinet opening and bracket
- Width, height and the mounting template all have to match what is already cut into the cabinet.
- Duct direction
- Rear, vertical and recirculating configurations are not interchangeable without ductwork.
- Two people and a lift
- An over-the-range unit is heavy, overhead, and not a one-person install.
Replace a microwave when
- It is a countertop unit and the quote is over about $125 — half the price of a new one.
- The magnetron has failed on a unit past year seven.
- There is any arcing damage to the cavity walls, which cannot be safely repaired.
- The door, hinge, or latch is damaged — a compromised door seal is a radiation containment issue, not a cosmetic one.
When it stops being a cost decision
The high-voltage capacitor holds a lethal charge with the unit unplugged, so the inside of the case is not a homeowner repair at any price on any model. And a door, hinge or latch that no longer closes correctly takes the appliance out of service immediately — that is the one part of a microwave where a fault is not merely expensive.
Three things override the arithmetic entirely. Safety is not a cost decision: an appliance that is a fire, gas, water or electrical hazard comes out of service regardless of what a repair would cost. A part that is discontinued ends the conversation whatever the quote was going to be. And a second failure on the same machine inside a year is telling you about the rest of the components, not about the one that just broke.
The question that settles it
Everything above is arithmetic on a typical microwave. One answer about your own appliance narrows it faster than any of it, it costs nothing to establish on the phone, and it is worth having before you commit to the $40–$80 diagnostic fee.
Ask this first
Ask nothing else until you have answered this one: is it a countertop unit or built in over the range? That single answer decides whether a repair is worth quoting at all, and any shop worth calling will ask it before giving you a price over the phone.
Then ask for a written estimate with parts and labour as separate lines, and hold the total against two numbers: $125, and the ceiling for your microwave's actual age — $53 at 5 years, $26 at 9. A quote between the two is where the decision is genuinely yours, and it is worth doing on a machine you have looked after and worth walking away from on one you have not.
Nothing here has seen your microwave, and nothing here is a quote. What this page can do is tell you which answers move the number — whether the fault is control board or touchpad or something a quarter of the price, before you pay anyone to look.
Repairing or replacing a microwave
Is it worth repairing a microwave?
At what age should I stop repairing a microwave and replace it instead?
What is the most I should spend on a microwave repair?
How much does replacing a microwave cost?
Does the brand change whether a microwave is worth repairing?
Which microwave repairs are not worth doing?
The same question on every other appliance
Where each appliance’s line sits, how long it is expected to last, and the age past which its cheapest priced repair stops paying back.
| Appliance | New unit | Replace above | Expected life | Cheapest repair pays through |
|---|---|---|---|---|
| Refrigerator | $1,200 | $600 | 14 yr | Year 12 |
| Washer | $800 | $400 | 11 yr | Year 9 |
| Dryer | $750 | $375 | 12 yr | Year 7 |
| Dishwasher | $700 | $350 | 10 yr | Year 6 |
| Oven & Range | $1,000 | $500 | 14 yr | Year 15 |
| Microwave | $250 | $125 | 9 yr | New only |
| Garbage Disposal | $200 | $100 | 10 yr | New only |
| Ice Maker | $400 | $200 | 8 yr | Year 4 |
| Freezer | $600 | $300 | 15 yr | Year 10 |
| Wine Cooler | $500 | $250 | 10 yr | New only |
| Range Hood | $350 | $175 | 14 yr | Year 6 |
| Trash Compactor | $800 | $400 | 10 yr | Year 9 |