How long do Day & Night HVAC systems last?

Most Day & Night air conditioners and heat pumps run 13 to 18 years, while Day & Night furnaces typically last 18 to 25 years when serviced annually. After about year 12 the cost of repairs tends to climb and efficiency drops noticeably compared with a current SEER2-rated unit.

Should I repair or replace my old Day & Night unit?

A common rule of thumb: multiply the repair cost by the age of the system. If that number is over $5,000, replacement usually makes more financial sense. Day & Night systems older than 12 years that still use R-22 refrigerant are particularly strong replacement candidates because R-22 has been phased out and recharging it has become very expensive.

Day & Night HVAC Age Lookup Tool

Day & Night is an old name in heating and cooling, a standalone company before it joined the ICP family under Carrier Global. Sold mainly in western states and built in Lewisburg, Tennessee, it shares engineering with Heil and Tempstar. Enter your Day & Night serial number to find the manufacturing date and system age.

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Day & Night HVAC System

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Finding Your Day & Night Serial Number

Check these four spots on your HVAC system

Common Locations

Outdoor unit

data plate on the side

Electrical panel

inside the access door

Indoor air handler

inside the cabinet door

Rating plate

top or rear of the unit

What to Look For

White or metallic manufacturer sticker
Labeled "Serial No." or "S/N"
Typically 8–12 characters long
Usually near the model number

Can't find it? Try the electrical access panel on the front of the outdoor unit or inside the air handler cabinet.

Serial Number Examples

Day & Night

E072514528R921500600

2nd–3rd characters = year, 4th–5th = week of that year

Don't worry if yours looks different — each brand has multiple formats and our system can decode most variations.

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About Day & Night HVAC Systems

Owned by Carrier Global (ICP)

Day & Night is one of the older regional HVAC brand names. It predates ICP and was a standalone company before being absorbed into what eventually became the ICP family. Today it's sold primarily in western states through ICP's contractor network, a Carrier Global division.

Day & Night systems share the same manufacturing base as Heil, Tempstar, Arcoaire, and the other ICP brands. The serial number format is consistent across all ICP brands: two-digit year in positions 2 and 3, manufacturing week in positions 4 and 5.

Common Day & Night HVAC Models & Series

The most-installed Day & Night residential systems on the market today, organized by tier. Knowing your series helps narrow down service parts and warranty terms.

Series	Type	Tier	Efficiency	Notes
PerfectFit HVA9 Air Conditioner	Air Conditioner	Premium	Up to 19 SEER2	Variable-speed inverter; same chassis as Heil HVA9.
PerfectFit HCA7	Air Conditioner	Mid-range	Up to 17 SEER2	Two-stage scroll compressor.
Easy N4A4 Air Conditioner	Air Conditioner	Entry	Up to 14.3 SEER2	Single-stage; the volume builder unit.
PerfectFit HCH6 Heat Pump	Heat Pump	Mid-range	Up to 17 SEER2 / 9 HSPF2	Two-stage heat pump.
PerfectFit G97CMN	Gas Furnace	Premium	Up to 97 AFUE	Modulating gas, variable-speed ECM blower.
Easy G9MAE / N9MSE	Gas Furnace	Mid-range	Up to 96 / 80 AFUE	Two-stage 96% or single-stage 80% options.

Day & Night HVAC Quick Facts

Warranty

Day & Night provides a 10-year parts warranty and 10-year compressor warranty with registration within 90 days; unregistered units default to 5 years. Heat exchangers carry a 20-year limited warranty, with Lifetime Heat Exchanger coverage on PerfectFit premium furnaces.

Expected Lifespan

AC / Heat pumps: 13 to 18 years
Furnaces: 18 to 25 years

Where It's Built

Lewisburg, Tennessee (ICP's main residential plant). Day & Night shares all production lines with Heil, Tempstar, Comfortmaker, Arcoaire, Keeprite, and Airquest.

Price Positioning

Mid-tier — typically priced similarly to Heil and slightly below Tempstar within the ICP family.

Known Day & Night Issues to Watch For

A short list of patterns reported on Day & Night equipment. Most have been addressed with revised designs or service bulletins, but they're useful context if you're diagnosing an older system.

•Day & Night is mechanically identical to other ICP brands, so it inherits the same micro-channel coil leak rates in coastal environments.
•Distribution is concentrated in western US states, so finding a Day & Night dealer for warranty service can be hard if you've moved out of region.
•Older units (pre-2010) may carry shorter warranty terms; check the original installer's paperwork rather than assuming current ICP coverage applies.

Day & Night HVAC FAQs

Day & Night data plates sit on the side of the outdoor condenser, near the service valves; furnace labels are inside the upper access door. Serials are 10 characters: factory letter, year in positions 2-3, week in positions 4-5.