HVAC Equipment Protection Add-Ons
Power surges, brownouts, and voltage spikes are hard on HVAC equipment — especially compressors, ECM motors, and control boards. Hartzell’s offers two Intermatic surge protection add-ons that can be installed during a service visit or new installation. Both include a 3-year connected equipment warranty.
Compressor Defender™
$383.00 installed
Dedicated surge protection installed directly on your AC disconnect. Protects the compressor — the most expensive component in your system — from damaging voltage events including brownouts, surges, and short cycling.
- Installs on AC disconnect in minutes
- 3-year product warranty
- 3-year, $7,500 connected equipment warranty
- ANSI/UL Listed
Intermatic AG3000
$291.00 installed
Type 1 and 2 whole-system surge protective device. Mounts on the AC disconnect or home electrical panel. Protects all HVAC equipment plus home appliances from surge events.
- Protects mini-splits, heat pumps, furnaces, boilers, ECM motors
- 200 kA surge current rating
- 3-year, $7,500 connected equipment warranty
- ANSI/UL Listed 1449, 4th Edition
- Type 4X weatherproof enclosure
Why Surge Protection Matters in Oklahoma
Oklahoma’s electrical grid sees more stress than most states — summer demand peaks, ice storm outages, and frequent thunderstorms all create voltage events that stress HVAC equipment. A compressor failure on a 5-year-old system can cost $1,200–$2,500 to repair or force an early replacement. Surge protection at $291–$383 installed is cheap insurance.
Both Intermatic units include a 3-year, $7,500 connected equipment warranty — meaning if a covered surge event damages your HVAC equipment while the device is installed, Intermatic backs the claim up to $7,500.
Sell Sheets — Printable / Downloadable
Click any image to open full size for printing.
Compressor Defender — Page 1
Compressor Defender — Page 2
AG3000 Surge Protector — Page 1
AG3000 — Page 2 / Specs
How to Add Surge Protection to Your System
Either unit can be added during a scheduled tune-up, after a repair visit, or at the time of a new system installation. Installation takes about 15–20 minutes. Ask about it when you call to schedule service.
Ready to Schedule?
Call 405-375-4822 or book online. Same-day appointments often available. Free estimates on new systems.
Nearby Communities We Serve
Frequently Asked Questions
Which device should I choose — Compressor Defender or AG3000?
The Compressor Defender is dedicated to protecting your AC compressor — the single most expensive component to replace. The AG3000 is a whole-system device that also covers mini-splits, heat pumps, furnaces, boilers, and ECM motors. If you want maximum protection across all equipment, the AG3000 is the stronger choice. If budget is a concern, the Compressor Defender covers the most costly failure point first.
Can surge protection be added to my existing system?
Yes. Both units install on your existing AC disconnect or electrical panel and take about 15–20 minutes to add during any service visit. You do not need a new system or major work — ask about it when you call to schedule a tune-up or repair.
What does the ,500 connected equipment warranty cover?
The 3-year, ,500 connected equipment warranty is provided by Intermatic. If a covered surge event damages your HVAC equipment while one of these devices is properly installed, Intermatic will back the claim up to ,500. This is in addition to your existing manufacturer’s warranty — it does not void it.
Does surge protection cover geothermal and mini-split systems?
Yes. The AG3000 is rated to protect mini-splits, geothermal heat pumps, variable-speed ECM motors, and standard HVAC systems. The Compressor Defender is optimized for standard AC compressors. For geothermal or multi-zone mini-split setups, we typically recommend the AG3000.
Why is surge protection especially important in Oklahoma?
Oklahoma sees frequent thunderstorms, ice storm outages, and summer demand peaks that stress the electrical grid. Voltage spikes and brownouts are common — and modern HVAC equipment with variable-speed motors and communicating control boards is more sensitive to them than older systems. A compressor failure alone runs ,200–,500. Surge protection at 91–83 is inexpensive insurance.
Add Surge Protection at Your Next Service Visit
Compressor Defender $383 installed — AG3000 $291 installed. Ask when you schedule.