HVAC repair for every brand, every system, in Stockton and the Central Valley
We repair air conditioners, furnaces, heat pumps and ductless systems. We diagnose the fault, quote the repair in writing before we start, and we are on site across Stockton, Sacramento, Modesto and the Central Valley.
HVAC repair means finding the actual cause of a fault and fixing that, rather than replacing equipment that still has serviceable life. RB HVAC Inc. repairs central air conditioning, ductless mini-splits, rooftop units, furnaces and heat pumps across Stockton, Sacramento, Modesto and the Central Valley, with 24/7 emergency and same-day availability, transparent diagnostics, and the price agreed in writing before any work begins.
Everything this service includes
Air conditioner repair
Central AC and ductless mini-splits that blow warm air, will not start, trip the breaker or are short-cycling.
Furnace and heating repair
Furnaces that will not ignite, burn short or fail to reach temperature, plus heat pumps that run but do not heat.
Emergency and same-day
When a system goes down in the heat or in the cold, call and we will tell you honestly whether we can get a technician out that day.
All major brands
We service virtually all types of central air systems and ductless mini-splits.
Diagnostics and testing
We test the system properly: refrigerant levels, electrical, airflow, thermostat and control board.
Thermostat and controls
A thermostat that is wired wrong or a control board that has failed will look like a whole-system problem.
How the job runs
The same four steps whether it is a repair, a replacement or a seasonal tune-up.
Tell us the issue and when it started. We will tell you whether that is a same-day emergency call, a next-day slot or a scheduled visit.
We test the system, find the actual fault and put the price of the repair in writing before anyone picks up a tool.
We complete the repair, hand over an itemised invoice and explain the warranty in plain language.
If anything is not right, call us back. Our workmanship is guaranteed and we will make it right.
Common HVAC faults and the fix for each
Figures are our own and are current as of this year. Final pricing depends on your system, your home and the work involved.
| Issue | Usual causes | What we do |
|---|---|---|
| Blowing warm air | Low refrigerant, a failed compressor capacitor, a dirty coil, or a thermostat set wrong | Recover refrigerant, replace the capacitor, clean the coil, or correct the thermostat |
| Will not start at all | Failed capacitor, tripped breaker, blown fuse, or a seized contactor | Replace the failed part and test the full start cycle |
| Short cycling | Low airflow from a blocked filter or a failing blower motor, or an overcharged system | Clear or replace the filter, replace the blower motor, correct the charge |
| Water leaking near the unit | A blocked condensate drain line, a cracked drain pan, or a poorly sealed coil | Clear and flush the drain, repair or replace the pan, reseal the coil |
| Loud noise when it starts | Worn blower bearings, a loose fan cage, or a failing compressor | Replace the blower assembly, tighten the cage, assess the compressor |
| Thermostat not responding | Failed thermostat, loose wiring, or a control board fault | Replace and re-address the thermostat, re-torque the connections |
Last reviewed October 2026 by RB HVAC Inc., California HVAC license #1094161.
Common questions
We offer 24/7 emergency service and same-day repairs across Stockton, Sacramento, Modesto and surrounding communities. If you call and describe the issue, we will tell you honestly whether we can reach you that day.
It depends entirely on the fault and the system, which is why we diagnose first and put the price in writing before we begin. We do not publish a repair price list because it would be wrong for your system. You will not be surprised by the invoice.
We service virtually all types of central air systems, ductless mini-splits, rooftop units, furnaces and heat pumps. If it is a refrigeration or heat pump system, our technicians are trained and licensed for it.
A useful working-out: multiply the age of the system by what you spend on repairs each year. If the total lands close to what replacing it would cost, replacement usually wins. If it is well under, the repair is usually worth doing. We will give you an honest read on which one you have, and we offer a free phone consultation to guide your installation choices.
Yes. We guarantee our workmanship 100%. If you are not completely happy with the work we have done, we make it right. We also guarantee our arrival window: if we miss it, the service call is free.
Yes, we charge a straightforward diagnostic fee for in-person service visits. That fee covers our technician driving out, testing the equipment, and pinpointing the root fault. Once diagnosed, we give you an upfront written repair price before any work begins. For new system replacements and installations, we offer a free phone consultation and guidance.
That is the situation our emergency service exists for. Call (209) 351-6000 and we will tell you what we can do and what it will cost before we start.
Services we also handle
Heat pump services
Repair and installation for heat pumps, including the newer R-454B refrigerant systems.
Heat pump services
Installation & replacement
Central AC, heat pumps and ductless mini-splits, sized with a Manual J load calculation.
Installation & replacement
Duct cleaning & repair
Damaged, leaking, or poorly sealed ductwork loses conditioned air to the attic, starves rooms of airflow, and drives up energy costs.
Duct servicesHVAC repair across the Central Valley
Same-day service and 24/7 emergency cover across Stockton, Sacramento, Modesto and the Central Valley.
Get upfront written pricing
We diagnose, quote in writing, and you approve the price before we start. 4.9 on Google across 215+ reviews.