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Serving Santa Clarita + 20 miles and Orange County from Tustin to San Clemente
Heater & Furnace Repair in Rancho Santa Margarita, CA
Being inland and near the foothills, RSM gets colder nights than the coastal cities, so the furnace actually works in winter. Most homes here have a gas furnace in the attic or garage from the 1990s or a later replacement. Igniters, flame sensors, inducer motors and pressure switches are the usual failures at that age. We check for carbon monoxide on every heater repair.
Furnace repair in Rancho Santa Margarita
RSM sits against the foothills, and winter nights here are colder than on the coast. The furnace does real work for a few months a year, which is why a failure in December is more than an inconvenience. Most homes were built in the late 1980s and 1990s, so many furnaces are original or on their first replacement. Our furnace repair calls here are mostly about age.
What we replace most
- Hot surface igniters and flame sensors.
- Inducer motors, which get loud before they fail.
- Pressure switches and limit switches.
- Blower motors and capacitors, which also affect your AC in summer.
- Control boards on older furnaces.
Attic furnaces and canyon dust
Many RSM homes have the furnace in the attic. Attic heat in summer is hard on wiring and plastic parts, and dust from the canyons and Santa Ana winds loads up filters and burners. A furnace that overheats and shuts down on the first cold night often just has a filter that was not changed after a windy fall. A yearly heating tune-up catches most of this early.
Carbon monoxide
Colder nights mean longer run times, and a furnace that runs for hours with a venting problem has more time to put exhaust into the house. We test for carbon monoxide and check the flue on every repair. If your CO alarm sounds, leave the house, call 911, then SoCalGas. Do not go back in until they clear it.
When the furnace is 25 or 30 years old
At that age, a cracked heat exchanger or a second major part in a few years usually means it is time to replace. A new furnace should be sized for the house, matched to the AC coil, and vented correctly for its type. If your AC is the same age, replacing both together or moving to a heat pump may make more sense. Replacements are permitted with the City of Rancho Santa Margarita. We give you a written price for each option. More on furnace installation.
Before you call
- Thermostat on Heat, above room temperature, batteries fresh.
- Filter clean.
- Furnace door closed and service switch on.
- One reset at most if it has locked out.
Call (323) 240-2373, 24/7, or book online and use code WEB25 for $25 off (coupons). We also cover Coto de Caza. More on our Rancho Santa Margarita AC and heating page.
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 Rancho Santa Margarita: 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 blower runs but the air is cold. What is it?+
Usually an ignition problem: igniter, flame sensor, pressure switch or gas valve. It needs a technician to test it safely.
How often should I change my furnace filter?+
Check it monthly in winter and after smoky days. Thin 1 inch filters often need replacing every 1 to 2 months here.
My furnace makes a loud whir when it starts. Is it about to fail?+
Often the inducer motor bearings are wearing out. It may run for a while, but it usually fails on a cold night. It is worth replacing before then.
Does a blower motor repair help my AC too?+
Yes. In most homes the furnace blower moves the air for both heating and cooling.
Can you check two furnaces in one visit?+
Yes. Many larger RSM homes have one system per floor, and we can check both on the same trip.
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

