Description
Overview
The FASS Fuel Systems Drop-In Series Electric Heater Probe Kit (Part No: DIFSHK1001) is a purpose-built heating element upgrade engineered specifically for FASS Drop-In Series fuel systems operating in extremely cold climates. Diesel fuel is notorious for gelling and thickening when temperatures plunge, leading to hard starts, restricted flow, and stalling. This electric heater probe kit installs directly into the dedicated heater ports built into every FASS Drop-In Series system, giving your fuel system the ability to actively manage fuel temperature before it ever becomes a problem.
Unlike a generic heating element for water heater tanks or household appliances, this is a diesel-specific electric heater element designed to dispense heat directly through the FASS system and its filters, keeping fuel flowing smoothly from the moment you turn the key.
How It Works
Once the ignition key is turned to the on position, the heating element begins warming the fuel system automatically. There’s no manual switch to flip and no guesswork involved — the heater element for water heater-style automatic controls found in this kit will shut itself off once the proper operating temperature has been reached, preventing unnecessary energy draw and simplifying operation for the driver. This automatic on/off cycling is designed to protect the system while ensuring consistent warmth is applied exactly when it’s needed most: cold starts and sustained cold-weather driving.
Key Benefits
- Dedicated electric heater element built for FASS Drop-In Series fuel systems
- Aids cold weather starts by warming fuel before it reaches the engine
- Helps prevent fuel gelling during extended cold-weather driving
- Automatic on/off heating element operation tied to key position
- Dispenses heat directly through the FASS system and filters
- Comes as a complete installation kit for straightforward setup
Fitment
This heater probe kit is designed to fit FASS Drop-In Series fuel systems installed on trucks and SUVs. Because it is built specifically for the Drop-In Series platform, it integrates with the existing heater ports on those systems without requiring aftermarket modification. Each kit is sold as a single unit (aaiaid: FKRH) and includes the components needed for a complete installation.
For diesel truck and SUV owners who run their FASS Drop-In Series system through harsh winters, this heating element kit is a practical, targeted upgrade. Rather than reacting to gelled fuel or a hard-starting engine, you’re proactively conditioning your fuel supply so your truck is ready to go no matter what the forecast looks like.





