FURNACE NOT HEATING
A furnace that isn't heating can be a major concern for homeowners, especially during the cooler months in the South Bay area of Los Angeles. When your furnace fails to produce warm air, it can lead to uncomfortable living conditions and potential damage to your home due to freezing temperatures or humidity. This issue may manifest as cold air blowing from vents, unusual noises from the furnace, or simply the absence of heat. Understanding the reasons behind this problem is crucial for timely resolution and maintaining a comfortable home environment.
If you smell gas or suspect a gas leak, evacuate immediately and call your gas company from outside the home.
QUICK FACTS
$150 - $800 for most repairs, $3,000+ for replacement
1-3 hours for most repairs
emergency
When to call: If you smell gas, leave immediately and call from outside. For other issues, call if basic checks don't help within 15-30 minutes.
Symptoms
- 1No warm air from vents
- 2Furnace doesn't ignite
- 3Blower runs but air is cold
- 4Furnace cycles on briefly then shuts off
Common Causes
- Thermostat Issues: Incorrect thermostat settings or a malfunctioning thermostat can prevent your furnace from igniting.
- Clogged Filters: Dirty or clogged air filters restrict airflow, causing the furnace to overheat and shut down.
- Pilot Light or Ignition Problems: A blown pilot light or a failed electronic ignition can stop the furnace from heating.
- Blower Motor Malfunction: If the blower motor is not functioning properly, warm air cannot circulate through your home.
- Electrical Issues: Faulty wiring, blown fuses, or tripped circuit breakers can disrupt power to the furnace.
- Blocked Vents or Ducts: Obstructions in the vents or ductwork can prevent heated air from reaching your living spaces.
- Gas Supply Issues: For gas furnaces, a lack of gas supply can halt heating, often due to closed valves or supply line problems.
BEFORE YOU CALL: DIY CHECKS
Check the Thermostat: Ensure that the thermostat is set to 'heat' and the desired temperature is higher than the current room temperature.
Inspect Air Filters: Open the furnace access panel and inspect the air filter. If it's dirty, replace it with a new one.
Examine the Pilot Light: For gas furnaces, check if the pilot light is lit. If not, follow the manufacturer's instructions to relight it.
Listen for Blower Operation: Turn the furnace on and listen for the blower motor. If it's silent, there may be a malfunction.
Check Circuit Breakers: Inspect the electrical panel to ensure that the breaker for the furnace hasn't tripped.
Look for Blockages: Inspect the vents and ducts for any obstructions that may be preventing airflow.
Homeowners can safely perform basic diagnostic steps such as checking the thermostat, replacing air filters, and ensuring that vents are clear of obstructions. However, if you encounter issues like a malfunctioning pilot light, electrical problems, or blower motor failures, it is advisable to call a professional HVAC technician. Attempting to fix complex issues without proper training can lead to safety hazards or further damage to your system.
PREVENTION TIPS
WHEN TO CALL A PROFESSIONAL
If your furnace is still not heating after checking the thermostat, filters, and other basic components, or if you notice any unusual smells, noises, or leaks, it is essential to call a professional HVAC technician immediately. Additionally, if you suspect electrical issues or gas supply problems, do not attempt to troubleshoot these on your own—contact a specialist to ensure safety and proper resolution.
RELATED SERVICES
RELATED PROBLEMS
Furnace Blowing Cold Air
A furnace that blows cold air isn't completing the heating cycle, leaving your home cold despite the system running.
Furnace Pilot Light Out
A furnace pilot light that won't stay lit prevents heating. This issue is common in older furnaces and usually has straightforward causes.
HVAC Short Cycling
Short cycling means your system turns on and off frequently without completing a full heating or cooling cycle. This wastes energy and stresses components.
No Heat Help in South Bay
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No Heat FAQ
Quick answers to common HVAC questions
First, check your thermostat settings and replace the air filter if it’s dirty. If the problem persists, there may be a more serious issue requiring professional attention.
COMMON HVAC PROBLEMS
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