Opel Frontera UBS. Manual - part 1843

Full hot switch

Ceramic heater

Heater unit

HEATING AND VENTILATION  1A – 5

CERAMIC HEATER

When the fan control knob (fan switch) turns on with the temperature control knob set to “FULL HOT” (full
hot switch “ON”), the ceramic heater in the heater unit gets hot, thus causing the heater blow temperature
of diesel vehicle to get high to improve the heating performance (Since the engine coolant temperature of
diesel vehicle is low, its blow temperature is also low.).

Glow plug

Full hot switch

Fan switch

Thermo switch

Less than 80°C (177.8°F)

CERAMIC HEATER

“ON”

CERAMIC HEATER

“OFF”

OFF

ON

OFF

OFF

OFF

ON

ON

ON

This illustration is based on RHD

1A – 6 HEATING AND VENTILATION

ON-VEHICLE SERVICE

HEATER UNIT

4a

5

3

4

2

6

9

8

7

1

Electro thermo connector (With A/C)

Resistor

Removal Steps

1. Instrument panel assembly
2. Water hose
3. Resistor connector
4. Duct
4a. Evaporator assembly (A/C only)
5. Instrument panel center bracket
6. Rear heater duct
7. Heater unit
8. Lap vent nozzle
9. Center ventilation lower duct

Installation Steps

To install, follow the removal steps in the
reverse order

This illustration is based on LHD

HEATING AND VENTILATION  1A – 7

INSTALLATION

To install, follow the removal steps in the reverse order,
noting the following points: 

1. When handling the ECM and the control unit, be

careful not to make any improper connection of the
connectors.

2. Adjust control lever assembly cables.

Refer to “CONTROL LEVER ASSEMBLY” installation
steps in this section.

3. When installing the heater unit, defroster nozzle and

center vent duct, be sure that proper seal is made,
without any gap between then.

REMOVAL

Preparation:

•

Disconnect the battery ground cable

•

Drain engine coolant

•

Discharge and recover refrigerant (W/A/C)
(Refer to Section 1B “REFRIGERANT RECOVERY”)

1. Instrument Panel Assembly

Refer to Section 10 “BODY” for INSTRUMENT PANEL
ASSEMBLY removal procedure. 

2. Water Hose

Disconnect water hoses at heater unit. 

3. Resistor Connector 

4. Duct 

4a. Evaporator Assembly

Refer to Section 1B “AIR CONDITIONING” for
Evaporator Assembly removal procedure. 

5. Instrument panel center bracket

6. Rear Heater Duct 

7. Heater Unit

8. Lap vent nozzle

9. Center ventilation lower duct

1A – 8 HEATING AND VENTILATION

Removal Steps

1. Heater unit
2. Duct
3. Case (Mode control)
4. Case (Temperature control)
5. Heater core
6. Mode door

Installation Steps

To install, follow the removal steps in the
reverse order.

HEATER CORE AND/OR MODE DOOR

4

5

3

2

1

6

This illustration is based on LHD