Webasto Thermo Pro 90 Scholastic Diesel School Bus Heater Kit with SmarTemp 3.0 BT Controller

Scholastic diesel school bus heater kit for cold-weather readiness

Keep Scholastic school buses reliable, comfortable, and ready for winter routes with a powerful diesel coolant heater kit designed for cold-weather operation. This Webasto Thermo Pro 90 12V diesel coolant heater delivers up to 31,000 BTU (9.1 kW), includes SmarTemp 3.0 BT control, and is available with or without an enclosure box.

Benefits & Use Cases

The Webasto Thermo Pro 90 Scholastic heater supports engine-off pre-conditioning, supplemental interior heat, and cold-start protection for school buses, shuttle buses, and fleet vehicles operating in demanding climates.

Choose the standard kit for compact installation without an enclosure box, or select the enclosure box option for added mounting protection in exposed or fleet-focused installs.

• Helps pre-heat engine coolant before cold morning school routes
• Supports idle reduction, fuel savings, and accelerated defrost
• Arctic Start function helps deliver quick pre-heat in extreme cold
• Quiet, efficient operation with automatic altitude adjustment up to 11,000 ft (3,350 m)

Technical Specificationsv

• Fuel Type: Diesel, Diesel 1, Diesel 2, Arctic, JP8, Biodiesel (PME)
• Voltage: 12V
• Heat Output: 6,100–26,000 BTU/h control range; 31,000 BTU/h boost (1.8–7.6 kW control range; 9.1 kW boost)
• Fuel Consumption: 0.05–0.23 gal/h control range; 0.29 gal/h boost (0.2–0.9 l/h control range; 1.1 l/h boost)
• Power Consumption: 37–83 W; 90 W boost
• Max Altitude: 11,000 ft (3,350 m)
• Operating Temperature Range: -40 to 176°F (-40 to +80°C)
• Warranty: 2 Years
• Dimensions (Heater body only): 15 × 5.5 × 9.13 in (381 × 140 × 232 mm)
• Weight: 10.8 lb (4.9 kg)
• Part Numbers: 5013917C without enclosure box; 5013918A with enclosure box
• Included Controller: SmarTemp Control 3.0 Bluetooth, controller part number 5013873

Compatibility

• Scholastic school buses and shuttle buses of all sizes
• Commercial trucks, light-duty trucks, and fleet vehicles
• Airport, agriculture, material handling, and off-highway vehicles
• Specialty, recreational, marine, and cold-climate vehicle applications

Kit Includes

• Thermo Pro 90 D 12V heater
• Mounting bracket
• Clamp hose 9.5–10.5 mm, 9 mm band ZP
• Fuel line
• Harness fuel pump DP42 TP90 5 m
• Tube flex SS 38 mm × 1 m with end cap
• Fuel filter
• Fuel hose 4.5 × 10.5
• Extension exhaust Ø38.1 × 178 mm
• Standpipe 4.76 × 828, 0.25 in. NPT fit
• Exhaust clamp
• Wiring harness power and switch
• Install hardware bag
• Thermo Pro 90 literature pack
• SmarTemp Control 3.0 Bluetooth
• Formed hose
• Elbow 0.75 × 0.75 copper
• Reducer elbow 1–0.75 in.
• Enclosure box included with option 5013918A only

Browse Webasto Manuals & Technical Documentation

FAQs

What is the difference between 5013917C and 5013918A?
Part number 5013917C is the Webasto Thermo Pro 90 Scholastic school bus heater kit without an enclosure box. Part number 5013918A includes the enclosure box for installations that need added mounting protection.

Is this Webasto Thermo Pro 90 kit suitable for Scholastic school buses?
Yes, this 12V diesel coolant heater is designed for Scholastic school buses, school bus fleets, and shuttle buses that need engine pre-heating, supplemental interior heat, and cold-start support.

What does the SmarTemp 3.0 BT controller do?
The SmarTemp 3.0 BT controller supports programmable run times, low-voltage disconnect adjustment, maintenance reminders, and heater fault code display.

Can this heater operate at high altitude?
Yes, the Webasto Scholastic Pro 90 supports automatic altitude adjustment up to 11,000 ft (3,350 m), making it suitable for many mountain and winter-route applications.

How much diesel does the Thermo Pro 90 use?
Fuel consumption ranges from 0.05–0.23 gal/h (0.2–0.9 l/h), with boost operation up to 0.29 gal/h (1.1 l/h), depending on heat demand and operating conditions.

How should I maintain a Webasto coolant heater?
Routine seasonal checks help keep the heater reliable through winter route use and fleet operation.