If Watchdog Surge Protector Blows Or Uses Up The Module, Does Entire Unit Need Replaced?
Published 09/23/2025
Products Featured in This Question
Question:
We bought the HU84ZR last season for our Cougar 30 amp trailer. If the surge board ever blows, do I need a whole new unit or is there a replacement?
asked by: Don
Expert Reply:
Good forward thinking, Don. You won’t need to replace the whole Watchdog Surge Protector / Voltage Booster # HU84ZR. It uses the replacement surge module # HU57ZR, which you can swap yourself in a few minutes. The Bulldog face will glow red and show an error code E9 when the board has done its job and needs replacing. Hughes even covers one free module within the first two years.
Would you want to keep a spare on hand, or just order one if it ever trips? I recommend grabbing an extra in case you ever need it as it would be cheap insurance.
Product Page this Question was Asked From
Watchdog Power Center Surge Protector and Voltage Booster - Bluetooth and WiFi - 30 Amp
- RV Surge Protectors
- Surge Protector
- 30 Amp
- Portable
- Bluetooth App
- WiFi App
- Hughes Autoformers
more information >
Continue Researching
- Search Results: hughes power watchdog
- Shop: etrailer Cable Lock - 10' Long - 5/16" Diameter - Steel - Keyed Alike
- Shop: Watchdog Power Center Surge Protector and Voltage Booster - Bluetooth and WiFi - 30 Amp
- Q&A: Is There Warranty If Watchdog Surge Protector Voltage Booster For RVs Takes A Surge And Goes Out?
- Video: Review of Hughes Autoformers Replacement Surge Protection Module Second Gen 30 Amp Watchdog - HU57ZR
- Shop: Replacement Surge Protection Board for 50 Amp ActiveStart Soft Start - 5,250 Joules
- Shop: Replacement Surge Module for Power Watchdog Surge Protector - 50 Amp
- Shop: Portable Power Watchdog Surge Protector with Bluetooth, WiFi, and Emergency Shut Down - 30 Amp
- Shop: Replacement Surge Module for Power Watchdog Surge Protector with Emergency Shut Down - 30 Amp
- Shop: Replacement Surge Protection Module for Gen 2 30 Amp Hughes Watchdog Surge Protector or Power Center
- Q&A: Does Watchdog Power Center Surge Protector and Voltage Booster # HU84ZR Have Emergency Shut Off
- Q&A: Is The Power Watchdog Surge Protector App Free To Use?
- Q&A: Can Watchdog Power Center Surge Protector Be Used On Both 30A AND 50A RV?
- Q&A: Availability of Shelf or Stand for Watchdog Power Center Surge Protector and Voltage Booster
- Q&A: How Much Does The Watchdog Surge Protector 30A HU84ZR Weigh?
- Q&A: Do I need Power Watchdog if I have Smart Surge Protector
- Article: Trailer Wiring Diagrams
- Article: Thank you!
- Article: Flat Towing Package for 2014-2018 Jeep Grand Cherokee
- Article: Best Vehicles to Flat Tow Behind an RV
- Article: How to Measure for Travel Trailer and Fifth Wheel Steps
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Article: Our Team Picked The Best Camping Gear of the Year - Here Are Their Top Choices