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Review on Zerostart 3400124 Wolverine FH 100 Silicone by Mike Roe

Revainrating 4 out of 5

Easy installation. Works great even on the coldest days.

These heaters are easy to install and work great. However, you drain your battery if you leave it on and the car won't start (oops). I would recommend taking built in fuses with you or using them in a dedicated protected circuit just because there is no real built in protection. EASY installation, has saved my diesel truck from gelling several times.

Pros
  • Not recommended for use above 10°C (50°F)
Cons
  • Quality