AC repair – We fix the real problem. Fix it or you don’t pay.
Most AC companies recharge your refrigerant and leave. Grandmark diagnoses the actual cause — shows you on video — then fixes it right the first time. Licensed technicians. Same-day available. $0 down financing. Serving all 5 California markets.
AC repair shouldn’t wait
for your budget.
Every hour a failing AC system runs in California’s heat, it’s getting closer to complete failure — and complete failure always costs more than a timely repair. Financing removes the financial reason to wait.
$0 down · 0% interest · 18 months
Available on all AC repair services. Same-day approval — no hard credit pull to check eligibility.
Our Lifetime Guarantee – Zero Risk
If we diagnose your AC repair and fix it, and the same problem comes back — we make it right at no charge. We stand behind every repair we complete.
— Grandmark Service Company · Applies to all residential and commercial AC repairs across all 5 California markets.
Here’s what most California homeowners experience before calling us:
Because we don’t patch symptoms. We fix causes. When you repair the right thing the right way, the problem stays fixed.
We Show You Exactly What’s Wrong — On Video — Before We Touch Your AC
No guesswork. No mystery invoices. No surprise “we found something else.
Mckay did a great job on the repair work. He also was professional and friendly. Thank you!!!!
Tom Lingenfelter
Fresno, CA
Romelo is the best ! He came to my home took his time to find out why my Ac wasn’t working and found out I had a leak in one of my units . He was very nice and understanding!
Sabrina Sanchez
Sacramento, CA
Excellent customer service. David López explained the procedure very well and answered all our questions. They are fast and efficient. 100% recommended.
Elyzabeth Ramirez
Bakersfield, CA
Four reasons California homeowners choose Grandmark for their AC Repair
Video-documented diagnosis
Our technician records the diagnosis on video — the failing component, the refrigerant level reading, the electrical fault — before quoting a single dollar. You see exactly what we find. No other HVAC company in California does this as standard.
root cause — not symptom patching
We find the leak before recharging. We diagnose why the capacitor failed early. We assess duct leakage before declaring the system undersized. Every repair addresses the cause — which is why our guarantee means something.
Written scope before we begin
You know exactly what we’re repairing, why, and what it costs before we touch the system. No open-ended invoices. No “we found something else” surprises when the bill arrives.
Fix it or you don’t pay
Same problem comes back after we repair it — we return at no charge. No argument. No invoice. We can make this guarantee because we fix the right thing the right way every time.
We Fix the Problem. Or You Don’t Pay. That’s Not Marketing — That’s Our Policy.
If we diagnose your system and fix it, and the same problem comes back — we make it right at no charge. We stand behind every repair we complete. Not because we have to. Because we want to be the company you call when it’s time for a full replacement
Every Type of AC & HVAC Repair — Residential & Commercial
Refrigerant leak detection and repair
We locate the source of the leak — not just recharge and leave. Leak detection using electronic and UV methods, source repair, then recharge to manufacturer specification. A recharge without finding the leak is a 60–90 day fix in California’s heat.
Capacitor and contactor replacement
The most common AC failure in California — capacitors degrade 2–3x faster in extreme heat. A $200–$400 capacitor replacement prevents a $1,800–$3,500 compressor failure. We test capacitor health on every service call even when it isn’t the presenting issue..
Compressor diagnosis and repair
The compressor is the most expensive AC component. Before recommending replacement, we perform full electrical and mechanical diagnosis to determine if the compressor is repairable — saving thousands when it is.
Condenser and evaporator coil cleaning
Dirty coils reduce AC efficiency by 20–40% and force the compressor to run hotter and longer. In Bakersfield and Modesto’s agricultural dust environment, coil cleaning is needed more frequently than anywhere else in California.
Thermostat and control board diagnosis
Incorrect temperature readings, communication failures between system components, and programming issues that cause erratic behavior. We diagnose before recommending replacements — often the fix is a calibration or wiring correction, not a new board.
Blower motor and air handler repair
Reduced airflow, unusual noises, and inconsistent temperatures are often blower motor issues — not compressor or refrigerant problems. We document airflow readings before and after to verify the repair.
Duct leakage assessment and sealing
A functioning AC system loses 20–30% of its cooling capacity through leaking ducts in many California homes. Sealing leaking ducts often resolves the comfort problem without any equipment change — at a fraction of the replacement cost.
Condensate drain line clearing
A blocked condensate drain causes water damage, triggers safety shutoffs, and creates mold growth inside your air handler. One of the most commonly overlooked items in California — and one of the simplest to address proactively.
Six signs your AC needs repair now — not later
Unusual noises — grinding, banging, squealing
Bearing failure, loose components, or debris in the system. What starts as a noise becomes a mechanical failure within days in peak operating conditions
Ice forming on the unit
You receive a detailed, itemized proposal: scope of work, materials, warranty details, timeline, and total cost. We walk you through every line.
Electricity bill spiking unexpectedly
A dirty coil, low refrigerant, or failing capacitor all cause the system to run longer to achieve the same cooling — adding 20–40% to monthly energy costs
AC running but not cooling
Low refrigerant, dirty coil, or failing compressor — any of which gets worse with every hour it runs
Short cycling — turning on and off frequently
Every compressor start is harder on the motor than continuous operation. 50–60 cycles per day destroys a compressor in years, not decades
Warm air from vents
Refrigerant leak, failed compressor, or restricted airflow — all of which compound quickly in California’s summer heat
FAQ
AC repair California — questions answered
Everything California customers ask before scheduling their AC repair.
Get your AC diagnosed
and fixed today.
Video-documented diagnosis. Root cause repairs. Fix it or you don’t pay. Same-day available across all 5 California markets.
We fix the problem or you don’t pay — guaranteed on every repair.