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Serving Santa Clarita + 20 miles and Orange County from Tustin to San Clemente
Heater & Furnace Repair in Northridge, CA
Northridge furnaces sit in hall closets, garages and attics, and many are 20 years old or more. Valley winter nights get cold enough that a furnace that sat all summer often fails on the first cold morning, usually from a dirty flame sensor or a weak igniter. We test the heat exchanger and check for carbon monoxide on every repair.
Furnace repair in Northridge: ranch homes, many setups
Furnace repair in Northridge rarely looks the same twice. Most of the area is 1950s and 60s single story ranch homes, and their heating has changed over the years. Some still have the original closet or garage furnace. Some had central heat and air added later, with ducts in a shallow attic or across the roof. Others use a rooftop package unit that heats and cools. And because many homes were repaired or rebuilt after the 1994 earthquake, two houses on the same street can have completely different equipment.
What fails on Northridge heating systems
- Ignition failures after summer. A dirty flame sensor or a cracked igniter. The most common first cold morning call.
- Rooftop package unit will not heat. Sun and dust wear out burners, inducers and igniters on roof units. See package units.
- Roof ducts losing heat. Ducts in direct weather lose a lot of heat through torn insulation and open seams. The furnace runs fine, but the rooms stay cold.
- Closet furnace overheating. Small returns and dirty filters trip the limit switch. See furnace short cycling.
- Old flue connections. On older natural draft furnaces we check the vent from the furnace to the roof for gaps and rust.
Floor and wall heaters
Some Northridge ranch homes still have an original floor furnace or a gas wall heater, often in a room the central system never reached. We repair them and check venting and carbon monoxide every time. See wall and floor heaters.
Furnace replacement in Northridge: when it makes sense
Replacing a part is the right call most of the time. Furnace replacement in Northridge makes sense when the heat exchanger is cracked, the furnace is 20 years or older and needs a major part, or the AC is on R-22 and failing at the same time. Many owners then choose a heat pump for heating and cooling in one system. Northridge is in the City of Los Angeles, so a replacement is permitted through LADBS, and we pull the permit. You get written prices for repair and replacement so you can compare. See furnace installation and furnace repair.
Carbon monoxide: what to do
If your CO alarm goes off, do not look for the cause. Get everyone out of the house, call 911, then call SoCalGas. Call us once the fire department or the gas company says it is safe to go back in. Every heater repair we do includes a carbon monoxide test and a look at the flue and gas connections.
Safe checks before you call
- Thermostat set to Heat, a few degrees above room temperature, with fresh batteries if it has them.
- Look at the filter. If it is gray and packed, replace it.
- Check the breaker and the service switch next to the furnace (it looks like a light switch).
- Make sure the furnace door or panel is closed tight. Most furnaces will not run with it loose.
- If you have a rooftop unit, stay off the roof. Tell us if you hear the fan start and whether any air comes from the vents.
No heat in Northridge? Call (323) 240-2373, 24/7, or book online and use code WEB25 for $25 off (see coupons). Same-day service in most cases. WY&G is a licensed HVAC contractor, CSLB C-20 #1044922, with over 25 years in the field. More about our work in Northridge AC and heating repair.
What we offer
What is included
Ignition and flame sensor service
Inducer and blower motor repair
Pressure switch and control board
Gas valve and burner service
Heat exchanger inspection
Carbon monoxide test
Stages
Heater & Furnace Repair in Northridge: how it works
Simple, clear and on your schedule.
Submit a requestStage 1
01Request
You call or send a request. We confirm the problem and set a time, usually the same day.

Stage 2
02On-site visit
The technician tests the system: electrical, refrigerant or gas, airflow and drain.

Stage 3
03Written estimate
You get a written diagnosis and price before any work starts.

Stage 4
04Service
We repair with quality parts and keep the work area clean.

Stage 5
05Support
We test performance, explain what we found and how to avoid it next time.

Tip
Common problems and what they mean
Starts, then shuts off
Usually a dirty flame sensor. Quick fix.
Blower runs, no heat
Ignition problem: igniter, pressure switch or gas valve.
Burning smell
A little dust smell on the first cold day is normal. A strong or lasting smell is not.
Error light blinking
Note the pattern through the panel window. It helps us bring the right part.
Heater & Furnace Repair nearby
Reviews
Reviews from our customers
WY&G is very reliable and professional. They were assigned by the warranty company and did excellent work. Same day fixed the problem and finished the work. Strongly recommends WY&G Inc for all AC repair or regular maintenance work for HVAC.
Canyon Country, CAWe’re very happy with WY&G services. We had our old heater & AC replaced in our unit. The tech guys are professional and provide high quality services. Definitely recommend if you want to upgrade your system. The crew worked smoothly and cleaned up after work.
Studio City, CAI don’t have enough good things to say about WY&G. They are professional, fast, and do quality work. I had a lengthy issue that required working with a home warranty and manufacturer’s warranty that WY&G was able to help me resolve. They are great with communicating and always called me back promptly. I will definitely be using them again.
Sherman Oaks, CAFAQ
Frequently asked questions
My furnace lights and then shuts off. Why?+
Most often a dirty flame sensor. It is a quick repair, and a sign the furnace is due for service.
I smell gas near the furnace. What should I do?+
Leave the house and call SoCalGas or 911 from outside. Do not touch light switches or the thermostat. Call us once it is safe.
How long does a furnace replacement take in Northridge?+
Most furnace replacements take one day. The LADBS permit and inspection are scheduled separately, and we handle both.
My heat comes from a unit on the roof. Can you fix it?+
Yes. Rooftop package units with gas heat are common in Northridge, and we repair both the heating and cooling side.
Is a heat pump a good replacement for my old Northridge furnace?+
Often, yes. Valley winters are mild enough for a heat pump to handle most of the season, and it replaces your AC too. We size it for the house.
How fast can you come?+
Same day in most cases, 24/7 for emergencies.
Do you check for carbon monoxide?+
Yes, on every heater call.
Licensed, insured C-20 HVAC contractor
All major brands
Our own team, no middlemen
Written price before work begins
Help with home warranty claims
Support after every repair and install
Consultation
Get a free quote and consultation
Send a quick request and we will call you back fast.
- A clear written estimate
- Help choosing the right system
- Straight answers to your questions

