Repair or replace your kitchen chimney? How to decide

Repair a chimney when the body, the ducting and the hood are sound and one component has failed — a capacitor, a bearing, a filter set, a switch panel. Replace it when the motor is worn out on a unit already past about eight years, when the chimney never had the suction the kitchen needed, or when the repair cost starts approaching half of what a suitable new unit would cost fitted.

The trap to avoid is replacing a perfectly good chimney because it looks bad or sounds loud. Both of those are usually grease, and grease is a service, not a purchase.

First, rule out the cheap causes

Before any repair-or-replace conversation, make sure the problem is not one of these:

• Filters that need washing, or mesh filters that are past saving.
• A grease-loaded blower wheel — the single most common reason a chimney seems finished.
• A non-return flap at the duct outlet stuck shut with grease.
• A duct outlet blocked by a nest or monsoon debris.
• An oil collector cup that overflowed and left residue everywhere.

A deep clean of motor, fan and filters is ₹499 on our rate card, and it revives more chimneys than any part does. If a technician recommends replacement before the unit has ever been properly cleaned, get a second look.

Worth repairing

Capacitor failure. The hum-but-no-spin fault. A small part, quickly changed, and the rest of the unit is unaffected.

Motor bearings, caught early. A whine that tracks the speed setting. Attended to before it grinds, this is a contained job.

Filters worn or corroded. A baffle or mesh filter swap is ₹699 and can transform a unit whose filters were the restriction all along.

Switch panel or push-button failure. Common enough on units in a hot, greasy kitchen and normally a part-level repair.

A stuck or broken duct flap, or a duct that has come apart at a clamp. Ducting work, not chimney work.

Lighting failure. Cosmetic to the airflow and simple to put right.

Lean towards replacing

The motor is finished on a unit over about eight years old. A motor is the most expensive single part in a chimney. On an old unit, spending that much buys you a new motor inside a tired body, with the electronics next in line.

The chimney was never right for the kitchen. Too small a hood over a wide hob, or a suction rating well below what the kitchen volume and your cooking demand. No part fixes an undersized unit.

Mesh-filter models you are tired of. If the design keeps disappointing you and the filters clog within weeks, a change of type is a better use of the money than another repair.

Repeated faults in the same year. Two or three separate part failures on an ageing unit is the pattern of a chimney reaching the end, not bad luck.

Corroded body on the coastal side. Homes around Muthukur, Krishnapatnam and the eastern edge of the city see salt air eat into the body and fixings. Once the structure and mounting points are rusted through, repairs stop holding.

The rough test

Add the quoted repair to any other work the unit will obviously need within the year. If that total gets close to half the cost of a properly sized new chimney installed, replacement is the better spend. Under that, and with the body sound, repair.

Also weigh how much cooking the kitchen does. A chimney over a hob used three times a day earns a new motor faster than one in a household that mostly eats out.

If you do replace

Size it for the hob and the room, not for the price tag. Check the duct route before you buy — a short run with one or two bends is worth more than a higher suction figure on the box. Installation with the duct run and power is ₹799, and removing the old unit with the opening capped off is ₹399. Any material or part is charged at MRP and shown to you before fitting.

Whichever way you go, get a written quote with the part named on it before work begins. A chimney fault should be explained to you in terms of a specific part — motor, capacitor, bearing, filter, flap — and if nobody can name the part, the diagnosis is not finished.