Furnace & central air

• Kind: system
• Where: basement mechanical room
• Status: needs attention

The facts

• Make / model: Carrier Comfort 80 gas furnace · central AC is a Carrier 13-SEER outdoor unit
• Installed / bought: furnace 2019 · AC 2016
• Serial / details: furnace serial on the plate inside the front panel (photo on file). One thermostat, a

Honeywell T6, in the upstairs hall.

• Manual: not on file yet — Carrier PDF online, model on the plate photo

Supplies & consumables

• Furnace filter: size 16x25x1 · qty on hand 0 · last stocked 2026-04-05
• Thermostat batteries (Honeywell T6): AA · qty on hand 3 · last stocked 2026-01-10

Where things live

• Spare furnace filters: basement shelf, right of the furnace (empty right now — buy 16x25x1)
• Furnace front-panel key / thumb screws: taped to the side of the unit
• Furnace switch (the "light switch" that kills it): top of the basement stairs, red plate

Care schedule

• Change furnace filter: every 3 months · last done 2026-04-05 · next due 2026-07-05
• Annual furnace tune-up: every 12 months · last done 2025-10-02 · next due 2026-10-02
• AC coil rinse: every 12 months · last done 2026-05-18 · next due 2027-05-18

Open items

• FLAG — furnace filter is overdue (due 2026-07-05) and there are none on the shelf. Buy a 16x25x1 before the

next change.

Attachments

• Furnace model plate: attachments/furnace-plate-2026-05.svg

Log

• 2026-05-18 — AC coil rinse and a look-over ahead of summer: coils clean, refrigerant fine. By: self · Cost: —
• 2026-04-05 — Changed furnace filter: put in the last 16x25x1 on the shelf — note to restock. By: self · Cost: —
• 2025-10-02 — Annual furnace tune-up: burners cleaned, igniter tested, all healthy. By: Rosedale Heating & Air · Cost: $129