Sep 3, 2026
AC Blowing Warm Air? Common Causes and Fixes
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Commercial HVAC
Grandmark Service Company
VerifiedEstablished · 28 yrs
4.7(2 reviews)•Residential•Serving Fresno, CA
EPAFully LicensedLicensed And InsuredLicensed, Bonded, And InsuredNATENCI
A top-rated HVAC and roofing company providing expert air conditioning repair, installation, and commercial building services in Fresno and Central California.
28
Years in Business
Yes
Emergency Service
Available
Financing Available
Fresno, CA
Service Area
Services Offered
AC RepairAC Replacement
Commercial HVAC
AC DiagnosticsRoof InspectionsRoof Repair & Replacement
HVAC Installation & Replacement
Energy Efficiency Solutions
Special Offers
Offer
free inspection and the same pre/post video-proof standard
Offer
free inspection so you know what qualifies before you commit
Customer Sentiment Summary
Strengths
- Carries a excellent 4.7-star average across 2 published reviews.
- Rated independently on BBB and HomeAdvisor, so the score isn't resting on a single platform.
- 28 years trading in the local HVAC market.
Areas to Watch
- Only 2 reviews carried enough detail to analyse — too thin to call out a weak point with confidence.
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