The ELTA heating and cooling range has a clear key focus on temperature control and therefore compliments our extensive engine management product portfolio.

Available in VXPRO and Xevo brands, the heating and cooling range consists of heater resistors for interior blower motors, pre-resistors for radiator fan motors, resistor cable repair kits and heater control valves.

All heating and cooling components are manufactured to exacting original equipment matching standards and are covered by a market leading five year, no quibble guarantee for complete peace of mind.

Only Original Equipment thermal fuses are used in the manufacture of ELTA resistors ensuring safe, reliable operation.

Heater (Blower Motor) Resistors

The heater resistor is also known as the heater blower motor resistor because it fundamentally controls the fan speed of the interior heater.

The ELTA range covers both traditional resistor based controllers (which typically feature 4 speed settings) and modern electronic speed controllers used in vehicles with more advanced automatic climate control systems.

The heater blower is one of the most commonly used cabin functions and so it is no surprise that these components are prone to wearing out. A failed resistor can result in several outcomes. The fan may stick at one speed (the variable control is lost), the fan may fail to work on some settings but continue to operate on others, or there may be no fan function at all.

Pre-Resistors (Radiator Fan Resistors)

The pre-resistor controls the speed of the radiator/cooling fan. Using information from the coolant temperature sensor, the vehicle activates the cooling fan when needed. Power to the fan is routed through a pre-resistor, which allows the vehicle to control the speed of the fan depending on the temperature of the engine. An increase or decrease in resistance effects the voltage though the motor, resulting in the required changes to fan speed.

Like any component, pre-resistors can wear out over time. A faulty or failing pre-resistor can result in the cooling/radiator fan failing to work, getting stuck at one speed or refusing to turn off (sometimes even after the car is turned off causing battery drain). Often the first sign noticed by the driver is an overheating engine.

Resistor Cable / Connector Repair Kits

A selection of connector/cable repair kits are available to support the range of heater/blower and fan/radiator resistors. Connectors and cables damaged by overheating are often the cause of the resistor and blower/fan not functioning. Equally, a failing resistor can cause damage to wiring and connectors. It is important to test both the resistor and the connection before replacing either component.

Heater Control Valves

The heater control valve helps to heat the vehicle interior by allowing warm engine coolant to pass through the heater core located in the cabin. Like any valve in frequent operation, the component can fail over time. Heater control valves are particularly prone to corrosion and cracking causing seizure and/or leakage.

Symptoms of a failed heater control valve include the heater failing to produce warm air, leaking coolant or erratic heater behaviour.

Heater Blower Motor

The blower motor is the fan that pushes air through the vents based on the climate system settings and the fan speed selected. When adjusting the fan speed it sends a signal through a resistor to the blower motor to either speed up or slow it down.