Webasto Thomas TSL 17 User Manual

Webasto TSL 17 Coolant Heater
Webasto Product N.A., Inc. 11 www.webasto.us
Basic Troubleshooting
General Information
This section describes basic troubleshooting procedures for the TSL 17 coolant heater. Troubleshooting is normally
limited to the isolation of defective components. For more in depth troubleshooting, servicing and repair of the heater,
refer to the Workshop Handbook available from Webasto Product N.A., Inc.
CAUTION!
Troubleshooting requires profound knowledge about structure and theory of operation of the heater
components and should only be performed by trained personnel familiar with Webasto heating systems.
Before troubleshooting, check for and eliminate the following for possible causes of a malfunction:
• blown fuses
• fuel supply (plugged fuel filter)
• corroded battery terminals, electrical wiring, connections and fuses
• loose contacts at connections and connectors
• shut-down initiated by temperature limiter
NOTE
After any correction of a malfunction, a functional test has to be performed with the heater normally installed in the vehicle.
General Malfunction Table
The following table lists possible malfunctions, probable causes and remedies.
Malfunction Probable Cause Remedy
Coolant heater switches
off unexpectedly
(Fault lockout)
No combustion after start
or automatic restart
Flame extinguishes during
operation
Heater overheats
Vehicle electrical system
voltage too low
Switch off heater momentarily and switch on once
again
Switch off heater momentarily and switch on once
again
Check for closed coolant circuit valves, obstructed coolant
lines. Check coolant level. Allow heater to cool down.
Switch off heater momentarily and switch on once
again.
Should heater fail to activate, see “Heater Lockout Reset
Procedure” on following page.
Charge battery
Switch off heater momentarily and switch on once
again
Heater expels black
smoke from exhaust
Combustion air and/or
exhaust tubing blocked
Check combustion and exhaust tubing for obstructions and
clear
Basic Troubleshooting

Webasto Thomas TSL 17 Specifications

General

Brand	Webasto
Model	Thomas TSL 17
Category	Heater
Language	English