Chery A1 2009, Service Manual, Page: 686 / 1080

CONDITION POSSIBLE CAUSES CORRECTION
The Low Side Pressure Is Too High,
And The High Side Pressure Is Too
Low
· Accessory drive belt slipping.
· Faulty compressor.
· Inspect the accessory drive belt
condition and tension. Tighten or
replace the accessory drive belt, if
required.
· Replace the compressor, if
required.
The Low Side Pressure Is Too Low,
And The High Side Pressure Is Too
High
· Restricted refrigerant flow through
the refrigerant lines.
· Restricted refrigerant flow through
the A/C accumulator.
· Restricted refrigerant flow through
the condenser.
· Inspect the refrigerant lines for
kinks, tight bends or improper
routing. Correct the routing or
replace the refrigerant line, if
required.
· Replace the accumulator if
restricted.
· Replace the restricted condenser, if
required.
Heater Performance
Engine coolant is delivered to the heater core through heater hoses. With the engine idling at normal operating tem-
perature, set the temperature control knob in the full hot position, the mode control switch knob in the floor heat
position, and the blower motor switch knob in the highest speed position. Using a test thermometer, check the tem-
perature of the air being discharged at the HVAC housing floor outlets. Compare the test thermometer reading to the
heater performance chart.
HEATER PERFORMANCE
Ambient Air
Temperature
15.5°C (60°F) 21.1°C (70°F) 26.6°C (80°F) 32.2°C (90°F)
Minimum Air
Temperature at Floor
Outlet
62.2°C (144°F) 63.8°C (147°F) 65.5°C (150°F) 67.2°C (153°F)
Both of the heater hoses should be hot to the touch. The coolant return heater hose should be slightly cooler than
the coolant supply heater hose. If the return hose is much cooler than the supply hose, locate and repair the engine
coolant flow obstruction in the cooling system.
Obstructed Coolant Flow
Possible locations or causes of obstructed coolant flow:
•
Pinched or kinked heater hoses.
•
Improper heater hose routing.
•
Plugged heater hoses or supply and return ports at the cooling system connections.
•
A plugged heater core.
Mechanical Problems
Possible locations or causes of insufficient heat:
•
An obstructed cowl air intake.
•
Obstructed heater system outlets.
•
A blend door not functioning properly.
•
Air trapped in the cooling system.
Temperature Control
If the heater outlet air temperature cannot be adjusted with the temperature control knob(s) on the A/C Heater control
panel, the following could require service:
•
The HVAC control panel.
•
The blend door actuator(s).
•
The wire harness circuits for the HVAC control or the blend door actuator(s).
•
The blend door(s).
•
Improper engine coolant temperature.
DIAGNOSIS & TESTING
13
13–
9
Chery Automobile Co., Ltd.