Furnace Repair in Lennox
Get fast, fair pricing from licensed local pros. Typical Lennox cost: $65 – $200 installed.
- Flame sensor
- $65 – $200
- Igniter
- $125 – $350
- Blower motor
- $325 – $1.2k
- Control board
- $250 – $650
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Furnace repair cost by part.
Typical Lennox repair pricing including parts and labor. A diagnostic fee usually applies and is often credited toward the work.
In Lennox, California, furnace repair costs reflect the area's older housing stock and local code requirements. With a median home built in 1958, many furnaces are nearing or past their expected lifespan, making repairs common. Typical service fees range from a $60–$150 diagnostic charge to parts like flame sensors ($65–$200) or blower motors ($325–$1,200). Because California mandates permits, Manual J load calculations, and HERS-verified duct leakage testing for most changeouts, labor and compliance costs add to the total. Given the mild Mediterranean climate and moderate cooling demand, a heat pump is often recommended over a gas furnace, especially with the federal 25C tax credit (30% up to $2,000 for heat pumps).
- Diagnostic / service callOften credited toward the repair$60 – $150
- Flame sensor or thermocoupleCommon no-heat cause on gas units$65 – $200
- Hot-surface igniterFurnace clicks but won’t light$125 – $350
- Blower motorNo airflow / weak airflow$325 – $1,200
- Heat exchangerCracked exchanger often means replace$1,200 – $2,800+
* A cracked heat exchanger is a safety issue — on an older furnace, replacement is usually the call.
Pricing reviewed · Local data from U.S. Census ACS
HVAC systems in Lennox
U.S. Census ACS- Households
- 8,275
- Homeowners
- 1,541
- 26% own
- Median home value
- $655,400
- Median income
- $54,611
- Median home built
- 1958
- Housing units
- 5,863
With a median home built in 1958, many Lennox AC and furnace systems are at or past their 12–15 year lifespan — a common reason replacements spike here.
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What’s different about Lennox.
Generic cost pages skip the things that actually decide your price and which system fits here — local code, climate, and the money you can claim back.
Recommended unit for Lennox
Given California’s mild (mediterranean), hot-dry inland climate and gas heating, high-seer2 heat pump is the sensible default for most Lennox homes. A pro can confirm the right size and system for your home with a load calculation.
Sources: Southwest Region SEER2 New Efficiency Standards · TECH Clean California Single Family Incentives · EIA California State Energy Data
What Lennox code requires
Installing or replacing an HVAC system in Lennox follows California rules under the state mechanical code. Here’s what applies statewide:
- PermitRequired
Mechanical permit pulled by your licensed HVAC contractor; covers equipment, refrigerant, and the electrical disconnect.
- SEER2 minimum14.3 SEER2 (Southwest, <45k BTU)
Federal Southwest-region minimum for new split-system AC. Higher tiers cut bills and unlock rebates.
- Load calculationRequired (Manual J)
Sizing by load calc — not rule of thumb — prevents an oversized unit that short-cycles and never dehumidifies.
- RefrigerantR-454B / R-32 (R-410A phased down 2025+)
- Good to know—
CA Title 24 requires HERS-verified duct leakage testing and Manual J sizing on most AC/furnace changeouts
Sources: Southwest Region SEER2 New Efficiency Standards · TECH Clean California Single Family Incentives · EIA California State Energy Data
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Money back in Lennox
California heating is mostly gas, which shapes the money back:
- State~$1,000 per system (up to 2 systems / $2,000 per home), market-rateTECH Clean California - Single Family Heat Pump HVAC Incentive →
State or utility program — verify eligibility before you buy.
- Federal30% of cost, up to $2,000Federal 25C tax credit — heat pump →
For a qualifying ENERGY STAR heat pump meeting the CEE efficiency tier. Claimed on your federal return.
The federal 25C tax credit (30%, up to $2,000 for a qualifying heat pump and up to $600 for a high-efficiency central AC) applies in every state.
Comfort back in three steps.
- 1
Tell us what’s wrong
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- 2
Get matched with a local pro
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- 3
Repair or replace, fast
Your pro confirms the price on-site and gets your comfort back. Most jobs done in a few hours.
Furnace Repair in Lennox, explained.
What affects furnace repair costs in Lennox?
Repair prices vary based on part type and labor complexity. For example, a simple flame sensor replacement is more affordable ($65–$200), while a heat exchanger repair can run $1,200–$2,800+. Older homes may have outdated ductwork or electrical systems, increasing labor time. California's Title 24 code requires permits and duct leakage testing, which adds $100–$300+ to any major repair or replacement. Choosing a heat pump instead of a gas furnace may qualify for the 25C tax credit, offsetting some costs.
Common furnace problems in Lennox
Igniter failure
The igniter may crack or wear out, preventing the furnace from lighting. Replacement costs $125–$350 plus diagnostic.
Flame sensor malfunction
A dirty or faulty flame sensor can cause the burner to shut off after a few seconds. Cleaning or replacement runs $65–$200.
Blower motor issues
Older homes often have blower motors that fail due to age or debris. Repair costs $325–$1,200 depending on motor type.
Furnace Repair FAQs — Lennox
Yes, California requires a mechanical permit for most furnace repairs or replacements. Your contractor should pull the permit and schedule a HERS-verified duct leakage test if applicable.
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