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Mitsubishi Electric aircon warranty: when cover starts

Mitsubishi Electric ties its aircon warranty to a receipt, not to the day the unit went up on the wall. Buy inside a renovation package and the cover can be part spent before the installer arrives. Registration decides whether it exists at all.

By Team Snowflake | Updated 18 Aug 2026

Cover runs from the receipt, not from the install

Mitsubishi Electric Asia starts the warranty on the purchase date shown on your sales receipt or invoice. Delivery and installation dates do not count, and the published terms say so directly. A unit that sits in its carton for a season is burning cover the whole time, and nothing about the day it finally goes on the wall resets that.

Hold two documents and the earlier one wins. The terms take the earliest date across every proof of purchase you produce. A deposit invoice from the showroom, followed by a final invoice at handover, means the deposit date is the one that runs. Where the warranty application and the receipt disagree, the receipt prevails.

No valid proof of purchase, no warranty period. The terms state that no period accrues at all without one, which puts the receipt above the unit itself. The distributor can also reject a document it judges altered, inconsistent with its own records or with payment records, or wrong about the true purchase timeline.

Renovation packages are where this bites hardest in Singapore. Contractors order units early, and handover slips by weeks. Ask the dealer to invoice on a date close to installation, or accept that the opening stretch of cover passes with the unit still wrapped. Either answer is workable. Discovering the gap during a claim is not.

Units that came with the flat

Units supplied under a new development project run on a different clock. Mitsubishi Electric issues a blanket warranty for project-supplied equipment, and the period starts on the date written into that document rather than on any receipt you hold. The purchase-date rule steps aside for these units.

The blanket warranty has to be produced when service is requested. Owners of new condominium units and BTO flats often never see it, because it sits with the developer or the main contractor. Ask for a copy at handover, while somebody still knows where it is filed.

Registration is the switch, and it has a deadline

Cover on a Mitsubishi Electric aircon is effective only once registration is completed and validated. That wording sits in the distributor's own warranty guidance. An unregistered unit does not have a slow claim ahead of it, it has no live warranty behind it, and that is a sharper position than most owners assume.

The registration window closes fourteen days after the purchase date. Registration runs through the distributor's online portal, and physical warranty cards were withdrawn for the M-series residential range in 2016. Nothing arrives in the post to prompt you, so the reminder has to come from you or from your installer.

Registration needs the model and serial numbers for the indoor unit and the outdoor unit alike. Those numbers come off perforated tags on the packaging. The installer is meant to tear them off and hand them over in an A5 envelope before installation begins. Renovation crews clear packaging fast, and once the boxes are gone the numbers have to be recovered off the equipment.

Keep the receipt after registering. The distributor advises holding the acknowledgement email and the proof of purchase together. Its dealer instructions also require receipts to carry the dealer stamp, the point of purchase, the purchase date, and the model and serial numbers. A receipt missing any of those can be refused as proof, which returns you to the no-proof position above.

When the packaging is already gone

The serial number is still on the unit. Mitsubishi Electric puts the model name and serial on a label at the lower right of the indoor unit. A torch and a phone camera recover what the carton would have given you, and the job takes a few minutes per room.

Treat that label as part of the warranty. A serial number that has been removed, defaced, altered, or worn illegible voids cover on that unit outright. Hard cleaning of the plastic housing, or a sticker lifting in a damp service ledge, can do it quietly. Once the number is unreadable there is no route back.

The compressor cover is narrower than the number suggests

Twelve months on parts, sixty months on the compressor. The longer term covers the cost of the compressor part alone, supplied new, and only where Mitsubishi Electric carries out the replacement itself. A compressor fitted by an outside contractor is not a warranty compressor, whatever the remaining term says on paper.

Labour and transport ride along for the first year only. Inside twelve months the limited warranty absorbs those charges. After month twelve the part remains free and every hour of work around it is billed to you. The distributor also assesses the failed compressor before it agrees the part is recoverable under the terms.

Refrigerant sits outside the cover entirely. The terms class refrigerant, driers, and other components of the refrigeration circuit as accessories, and accessories are excluded. A compressor change means recovering gas, fitting a new drier, pulling a vacuum, and recharging. None of that is warranty work in year two, and the bill reflects it.

The distributor also decides what counts as a part. The terms state that the definition rests solely with the company and that its determination is final. Ask for the quote split before approving anything, so the free line and the billed lines sit separately on the page. On any claim the company chooses whether to repair or to replace.

The compressor cover is narrower than the number suggests summary table
Cost itemNew compressor partInside the first yearSupplied freeYear two to year fiveSupplied free
Cost itemLabour to remove and fitInside the first yearCoveredYear two to year fiveBilled to you
Cost itemTransport and handlingInside the first yearCoveredYear two to year fiveBilled to you
Cost itemRefrigerant, drier, circuit partsInside the first yearBilled to youYear two to year fiveBilled to you
Cost itemScaffold or false ceiling accessInside the first yearBilled to youYear two to year fiveBilled to you

Accessories, and why the word matters

The accessory list is longer than most owners expect. Remote controls, plastic panels, cabinets, dust covers, filters, strainers, driers, refrigerant, knobs, and detachable fittings are all named in the terms as accessories rather than parts. The test the company applies is whether the item is essential to core function.

That places several common failures outside cover in year one. A remote that stops transmitting, a cracked front panel, a filter frame snapped during cleaning. Each is chargeable on a unit that is otherwise fully warranted, and none of them is a sign that anything is wrong with the claim process.

Ask which side of the line a component falls on before work starts. The classification is the distributor's call, and the answer is easier to hear on a phone call than to read on an invoice. Access costs work the same way. Scaffolding, cranes, false ceiling openings, permits, and restricted-entry sites are all charged to the owner.

The clauses that void the cover, not just exclude it

Two lists sit in the terms, and they carry different weight. One names what the warranty does not pay for, such as rust, ordinary wear, stains, and cleaning. The other names conditions that void the warranty on that unit, which ends the cover rather than trimming it.

Missing routine servicing sits on the void list. The terms void cover where routine maintenance servicing is not carried out, so a Mitsubishi Electric unit carrying no servicing record is exposed on the harsher of the two lists. Servicing stays chargeable throughout, in year one and after, and the distributor recommends a quarterly cycle.

Renting the unit out appears there too. The void grounds include use that is non-residential or commercial, and rental or loan to other users. Landlords letting a whole flat should raise this with the distributor directly rather than assume the clause points elsewhere. A written answer before a fault is worth more than an argument during one.

The rest of the void list is about how the unit was treated. Wrong or abnormal supply voltage, installation outside the stated specification, alteration or modification, and unauthorised repair. Any one of them removes the cover before the fault itself is discussed. Where cover is voided, the transport and handling charges for the inspection still fall to you.

The installer sets part of your warranty position

Installation work is excluded from the limited warranty, and installation outside specification voids that warranty. Both statements point the same way. Faults created during fitting belong to the installer, and the manufacturer's cover does not stand behind them. That is why the installer's own workmanship terms deserve as much attention as the brand warranty.

The benchmark is the manufacturer's own documentation, not local habit. The void clause names installation to the wrong alternating current supply voltage, installation to abnormal voltage supply, and installation otherwise not in accordance with the company's or the manufacturer's required specifications. Nothing in that wording defers to what an installer usually does on comparable jobs. Ask for written confirmation that the unit went in to the published specification, and file it with the invoice.

Copper piping only. The distributor states that system performance is not guaranteed where aluminium piping is used, which matters on price-led installations. Settle what the quote includes before any pipe disappears above a false ceiling. The distributor also recommends a drainage kit on the outdoor unit, to stop condensate dripping onto a neighbour's outdoor unit.

What cover looks like after a repair

A part replaced inside the warranty keeps the balance of the original period, or one month from the replacement, whichever runs longer. A control board fitted in the last week of the parts year runs on the one month option, because a month from the fitting date outlasts the days left on the original term. That extra cover attaches to the replaced part, not to the whole unit.

Repairs outside the warranty carry their own short cover. The terms give one month from completion, limited to the parts actually replaced and to the same fault that prompted the visit. A different failure the following week is a new job at full cost, and a later repair does not restart the month.

Declining part of a recommended repair forfeits even that. Where a customer chooses not to proceed with some of the recommended scope, and the same fault returns as a result, the one month service warranty does not apply. Partial repairs are cheaper on the day and unbacked afterwards, which is the trade being made whether or not anybody names it.

Cover cannot be bought forward either. Mitsubishi Electric states that it offers no extended warranty on air conditioners, and it reserves the right to change the warranty terms without notice. Cover holds in Singapore only, and not in locations that road access from the mainland does not reach. Check the current terms rather than a copy saved years ago.

The evaluation charge on an uncovered visit

Ask about the evaluation position as well. Inspection outside warranty can attract an evaluation charge whether or not a repair follows, so that figure is worth knowing before the visit is booked. Have the model, the serial, and any error code or blink count ready, since the distributor asks for those to open a job.

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