Repair or Replace Your Furnace?
Free referrals to independent local heating contractors serving Big Bear Lake, Big Bear City, and nearby mountain communities.
Repair usually makes sense when the furnace is not very old and the problem is a common part. Replacement is worth pricing when the heat exchanger is cracked, repairs are frequent, or the unit is more than 20 years old. HomeGuide's national estimate for a new gas furnace runs $3,800 to $12,000 installed, depending on size and efficiency.
Last reviewed October 19, 2026.
What questions help you decide?
- How old is it? HomeGuide puts typical furnace life at 15 to 30 years, and suggests replacement for units needing frequent repairs or over 20 years old.
- What failed? Ignitors, sensors, and switches are routine. A cracked heat exchanger is a safety issue that often tips the decision.
- How often has it failed? Several repairs in a couple of seasons is a signal.
- Is it the right size? An oversized furnace short cycles; a new one should be sized from a load calculation.
What does a replacement involve in Big Bear?
A replacement includes removing the old unit, matching venting (high-efficiency furnaces vent through PVC and need a condensate drain that won’t freeze), checking ductwork and gas piping, and pulling a permit where required. Ask the contractor who obtains the permit.
What does a new furnace cost?
National estimates from HomeGuide: gas furnace replacement $3,800 to $12,000; propane furnace $2,200 to $5,700; electric furnace $1,900 to $5,600. Mountain installation and access can affect price.
When should you call an emergency furnace pro in Big Bear?
Call for urgent help, and leave the house first where noted, if any of these apply:
- You smell gas (a rotten-egg odor): leave right away without flipping switches, then call 911 or your gas utility (Southwest Gas in the Big Bear Valley) from outside.
- A carbon monoxide alarm sounds, or people feel headache, dizziness, or nausea that eases outdoors: get everyone into fresh air and call 911.
- There is no heat and indoor temperatures are dropping toward freezing, especially with infants, older adults, someone with a medical condition, or water pipes at risk.
- The furnace trips the breaker repeatedly, smells like burning wiring, or shows scorch marks.
- You see flames outside the burner area, heavy soot, or a lazy yellow flame instead of a steady blue one.
- A vacant cabin's thermostat or smart sensor reports the house is losing heat during a cold spell.
If you smell gas or a carbon monoxide alarm goes off, leave the building first and call 911 or your gas utility from outside. Don't wait for a contractor.
Where is repair or replace? help available near Big Bear?
Requests are taken from Big Bear Lake and these nearby communities:
What do people ask about furnace repair in Big Bear?
How long does a furnace last?
HomeGuide reports 15 to 30 years depending on brand, installation, fuel type, use, and maintenance.
Is a heat pump an option in Big Bear?
Cold-climate heat pumps exist, but sizing for very cold nights and backup heat matter. Ask a contractor to compare options for your home.
Do I need a permit to replace a furnace?
Furnace replacement typically requires a permit in California. Ask the contractor who obtains it and whether the job includes inspection.
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