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ABC Service vs Therma Tech
Santa Clara HVAC Contractors Comparison · Updated March 2026
Therma Tech brings 18 years of licensed experience versus ABC Service's 4 years, making it significantly more capable for complex HVAC installations and system diagnostics.
| ABC Service | Therma Tech | |
|---|---|---|
| Rating | ★ 4.8 | ★ 4.9 |
| Years Licensed | 4 years | 18 years |
| License # | 1091355 | 913806 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Los Gatos, CA | San Jose, CA |
| Website | www.heatcoolabc.com | www.thermatechhvac.com |
Key Differences
What Customers Say
ABC Service
Customers emphasize ABC Service's rapid response for emergency repairs and convenient digital communication, with feedback spanning both appliance fixes and HVAC service calls.
Therma Tech
Customers highlight Therma Tech's thorough diagnostic approach with photo documentation, professional installation workmanship, and detailed maintenance inspections with repeat business over multiple years.
Key Takeaway: ABC Service's feedback centers on speed and convenience for repairs across multiple service types, while Therma Tech's reviews emphasize technical thoroughness, installation quality, and long-term customer relationships for HVAC-specific work.
Customer Reviews
ABC Service
Convenient, quick and thorough cleaning of my HVAC, Dryer and water heater. Highly recommend
I had a great experience with ABC Service HVAC & Appliances when they fixed my dishwasher. They were fast, responsive, and flexible with their availability, making scheduling a breeze. They arrived ri...
Recurring issue with pilot light on furnace being extinguished. ABC Service HVAC was kind to squeeze us onto the schedule towards the end of the day on the very same day that we called. Barely into ...
Therma Tech
Those of you reading my reviews, you know how important quality of service is to me. Any company I come in contact with, I pay close attention to their quality of service, value and even some time aft...
Everyone at Therma Tech was great to work with and professional. They worked with us to get the duct work done as soon as possible to get the heat back on for our tenants.
Very honest and knowledgable. They arrive right on time and are able to root-cause the issue and fix it in no time. Highly recommend them.
Consider ABC Service if...
- ✓ You need a quick appliance repair rather than HVAC work, as ABC Service handles washers, dryers, dishwashers, and refrigerators alongside heating and cooling systems.
- ✓ Your HVAC issue is straightforward like a thermostat replacement, capacitor failure, or filter maintenance where deep diagnostic experience matters less.
- ✓ You prioritize online scheduling convenience and prefer working with a growing local business for routine service calls.
- ✓ Budget is your primary concern for minor repairs, as newer companies sometimes price more competitively to build their customer base.
Consider Therma Tech if...
- ✓ You're facing a complete system replacement, heat pump installation, or ductwork modification where 18 years of experience directly impacts quality and problem-solving.
- ✓ Your home has an older HVAC system that may have hidden complications requiring veteran diagnostic skills to identify underlying issues beyond obvious symptoms.
- ✓ You need dual fuel system work, variable speed heat pump installation, or other complex configurations that benefit from specialized HVAC focus.
- ✓ You value high owner involvement and want a contractor whose entire business reputation rests on HVAC work rather than splitting focus with appliance repairs.
Questions to Ask Before Hiring
- → Ask ABC Service how many full HVAC system installations they complete annually versus repair calls, and request references for projects matching your specific needs.
- → Ask Therma Tech about current lead times for installation work given their established customer base, especially if you need service during peak heating or cooling season.
- → If your project involves ductwork modifications or system upgrades, ask both contractors about their specific experience with your home's configuration and any permits required.
The Bottom Line
For complete HVAC system installations, complex diagnostics on older equipment, or specialized work like heat pump conversions and ductwork modifications, Therma Tech's 18 years of focused experience provides meaningfully better technical capability and problem-solving depth. If you need appliance repair or have straightforward HVAC maintenance needs, ABC Service offers responsive service with convenient scheduling at four years licensed. Both maintain proper insurance and bonding, but the experience gap isn't trivial for installation work or complicated system issues. Choose ABC Service for quick repairs and appliance work; choose Therma Tech when the project complexity justifies paying for veteran expertise.
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Frequently Asked Questions
For straightforward repairs like replacing a gas valve or capacitor, both companies demonstrate capability based on customer feedback. However, if your furnace has persistent issues that previous contractors couldn't solve, or if diagnostic work reveals multiple potential problems, Therma Tech's 18 years of exclusive HVAC focus provides substantially deeper troubleshooting resources. The experience gap matters most for complex diagnostics and complete system work.
ABC Service holds the proper license and insurance to perform installations legally. However, their customer feedback emphasizes repair work and appliance services rather than major installation projects. If you're replacing your entire system, ask specifically about their installation volume and request references from similar projects to assess their depth of experience with the particular equipment you're considering.
Not necessarily. Customer reviews indicate Therma Tech performs detailed maintenance inspections with photo documentation, which can catch developing problems early. While ABC Service can certainly handle filter changes and basic tune-ups, Therma Tech's comprehensive approach may provide better value for aging systems where thorough inspection prevents future breakdowns. Both offer maintenance services at what customers describe as fair pricing.
Both companies receive consistent praise for rapid response, with customers reporting same-day and even late-night emergency availability from ABC Service, and same-day or next-day appointments from Therma Tech including during heat waves. For emergency responsiveness, the feedback suggests comparable performance. The choice should depend more on the complexity of your issue than speed of arrival.
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How We Compare Contractors
License Verification
All license data is sourced from official California CSLB records and verified regularly.
Review Analysis
Customer reviews are aggregated from Google and analyzed to identify patterns in service quality.
Detailed Comparison
We analyze credentials, insurance, experience, and feedback to highlight meaningful differences.
Not all licensed contractors are created equal. While a valid license is the baseline requirement in California, contractors can vary significantly in experience, insurance coverage, and customer satisfaction.
- Experience matters: A contractor with 15+ years of experience has likely encountered and solved problems that newer contractors haven't faced yet.
- Workers' compensation protects you: If a contractor without workers' comp insurance has an employee injured on your property, you could be held liable.
- Reviews reveal patterns: Individual reviews can be misleading, but patterns across many reviews often reveal a contractor's true strengths and weaknesses.
- Bond amounts vary: A contractor's bond provides financial protection if they fail to complete work as agreed. Higher bonds offer more protection.
Taking time to compare contractors on these factors can save you from costly mistakes and help ensure your project is completed by a qualified professional.
Data Sources: License information from California CSLB. Ratings and reviews from Google. Last verified March 13, 2026.
This comparison is based on publicly available information. We recommend getting multiple quotes and verifying all credentials directly before hiring.
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