What we offer
What is included
Cooling and heating side diagnostics
Burner and igniter service on gas packs
Curb and duct connection inspection
Crane-free replacements when possible
Corrosion and cabinet checks
Light commercial rooftop units
Before you call
Quick checks you can do yourself
- Set the thermostat to Cool, a few degrees below room temperature, and replace its batteries if it uses them.
- Replace the air filter if it looks gray or clogged.
- Check the AC breaker in the panel and the disconnect next to the outdoor unit (reset a tripped breaker once only).
- Clear leaves, plants and boxes about 2 feet around the outdoor unit.
- If you see ice on the lines, switch the system to Off and the fan to On until it melts, then call.
Still not working? Call (323) 240-2373 or tap "Call me back". Do not open electrical panels or touch gas parts.
Troubleshooting guides
Common problems, explained
Troubleshooting
AC Blowing Warm Air? 7 Causes and What to Do
An AC that blows warm air is most often caused by a wrong thermostat setting, a clogged air filter, a tripped breaker for the outdoor unit, or a dirty outdoor coil. If those check out, the likely cause is a failed capacitor or contactor, or a refrigerant leak, and those need a licensed technician.
Read the guideTroubleshooting
AC Frozen? Ice on the Lines or Coil: Causes and Fixes
An AC freezes when the indoor coil gets too cold, usually from low airflow (dirty filter, closed vents, weak blower) or low refrigerant from a leak. Turn cooling off and run only the fan to thaw it, replace the filter, and if it freezes again, call a technician to check airflow and refrigerant.
Read the guideTroubleshooting
AC Leaking Water Inside the House? Causes and Fixes
An AC leaking water indoors is usually caused by a clogged condensate drain line, a cracked or rusted drain pan, or a frozen coil that is melting. Turn the system off, check the drain line and float switch, and call a technician if the pan is damaged or the leak continues.
Read the guideRooftop Package Unit Repair in Santa Clarita & Orange County
WY&G, Inc. provides rooftop package unit repair for homes and light commercial buildings in Santa Clarita, Valencia, Saugus, Canyon Country, Newhall, Stevenson Ranch, Castaic and the north San Fernando Valley, and across Orange County from Tustin and Irvine to San Clemente. Repair and replacement of rooftop and ground package units and gas packs. Every visit starts with a diagnostic and a written price, and our licensed technicians (CSLB C-20 #1044922) explain what they found in plain language.
Rooftop Package Unit Repair by city
Stages
Rooftop Package Unit Repair: how it works, step by step
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
No cooling, fan runs
Capacitor, contactor or compressor. Same as split systems.
No heat from a gas pack
Igniter, flame sensor or gas valve. Sun and wind wear these faster on roofs.
Water leaking into the house
Roof curb or drain problem. Needs attention quickly.
Unit is 20 years old
Time to compare replacement options.
Pro tip
Package units sit in the sun all year. A yearly service catches corroded burners and wiring early.
Related
More cooling services

AC Repair
Same-day diagnostics for units that will not cool, will not start, leak or keep shutting off.
Get details
AC Installation & Replacement
Right-sized, permitted, efficient systems installed by our own crew, not subcontractors.
Get details
Ductless Mini-Split Installation
Quiet, efficient heating and cooling for rooms without ducts: additions, garages, bedrooms.
Get details
Heat Pump Installation
One system for cooling and heating. Repair, replacement and conversion from gas furnaces.
Get detailsReviews
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
Do you service rooftop units on homes?+
Yes, they are common in older Canyon Country and Newhall homes.
Do you work on commercial rooftop units?+
Yes, on light commercial buildings.
Can you replace a package unit with a split system?+
Often yes. We look at the home and give options.
Do you pull permits?+
Yes, for every replacement.
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

