Diagram showing passenger compartment ventilation (page 2 of 2)
- Make
- Fiat
- Model
- Punto (176) Factory Service Manual
- Year
- 1993–1999
- Section
- Heating/ventilation
The heater unit for the air conditioning system with manual controls is shown in the figure. Air mixing and distribution functions are achieved using conventional knob controls on central panel (A). These are as follows:
B: air mixing knob.
102: fan speed switch knob.
D: air distribution knob.
The knobs act via cables directly on mixer and distribution flaps whereas switch (102) regulates fan speed via resistance divider (103) located in air duct.
Two buttons, (99) and (C) on the panel activate air conditioner and recycle function respectively.
The recirculation flap is controlled by actuator (F) that incorporates a timer to limit actuator motor activation time.
A compartment in the air duct between fan and assembly case contains evaporator (6). A self-regulating expansion valve (E) is installed on the evaporator inlet pipe.
Heater/air conditioner with manual controls
| A Heater/air conditioner control panel | 99 Air conditioner activation button |
| B Air mixer knob | 100 Fan circuit supply relay |
| C Recirculation activation button | 101 Relay for fan first speed activation upon air conditioner activation |
| D Air distribution selection knob | 102 Fan speed selection switch (104) |
| E Expansion valve (NIPPONDENSO) | 103 Resistance divider for fan speed regulation (104) |
| F Recirculation flap control timer actuator | 104 Electric fan |
| G Evaporator (NIPPONDENSO) | |
| H Heater radiator | |
| I Connectors | |
| 95 Compressor ECU |
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