Swamp Cooler Pad Replacement & Annual Service Calculator

This one answers the maintenance question rather than the breakdown question: what does it cost to get the cooler ready for a Reno summer, or put away before a Reno winter, with the right pads in it. Pick the visit, the pad type, the cooler, the roof, and whether it was drained last fall. The number updates on the page and there is no email gate.

Everything it adds up is published on the pricing page. The only thing no calculator can see is the pan. On the decades-old coolers still running across Sparks and the mid-century southwest, a start-up is often when a rusting pan gets its honest assessment, and that is a replacement conversation rather than a service one.

What each answer changes

• The visit sets the labor. A spring start-up is $120 to $250 and covers the pan clean, new pads, oiled bearings, a tensioned belt, a set float, a pressure-checked water line, and every speed tested. A fall winterization is $100 to $200 and covers the water off, the line and pan drained, pads out, cover on, damper sealed. Booked together they are $200 to $400.
• Pads are the annual expense and the part that actually does the cooling. Aspen at $80 to $200 a set gets replaced every spring; rigid media at $300 to $700 runs 3 to 5 years and cools a few degrees deeper on a 94 degree afternoon. The pad replacement page walks the choice, including why rigid media is the wrong buy on a cooler with a failing pan.
• Cooler size scales the pad sets and the time. A window or small side-draft unit is a ground-level job with small pads; a large two-speed down-draft takes bigger sets on all four sides.
• Roof access is time, not parts. A steep or two-story roof adds ladder work.
• Last fall is the honest one. A cooler that was drained, dried and covered starts up cheaply. A cooler that sat full through the winter is where the extra hundreds come from, and the calculator shows that gap on purpose.

Reading the result honestly

Two things sit outside this number. The first is the bleed-off. A bleed-off line or purge pump dumps a small continuous stream of mineral-heavy pan water so the concentration never climbs, and on a supply that swings from under 2 grains per gallon to nearly 14 across TMWA’s published areas and quarters it roughly doubles pad life. It is quoted with the visit rather than from a published range, because what it takes depends on the cooler and the drain. If yours does not have one, it is the best money on the roof.

The second is timing. Start-ups get booked from late April, since NOAA’s 1991-2020 normals put the 50 percent date for the last 32 degree night at the Reno airport at April 26, with a 10 percent chance of a freeze after May 12. Shutdowns get booked before the first fall freeze, a 10 percent chance by October 5 and 50 percent by October 19. Booking either in the shoulder season is a scheduled stop; booking it on the first 95 degree afternoon or the night a hard freeze appears in the forecast is a scramble.

If the cooler is already broken rather than just due, use the repair cost calculator instead, and the warm air page has the five-minute check that narrows it before you call.