Workshop Manuals Factory service & repair Rover
Rover Rover 600 Repair Manual - Volumes 1 and 2 - 2nd Edition17 · Heating and ventilation
17 · Heating & A/C

Heater fan switch (page 2 of 2)

Make
Rover
Model
600 Rover 600 Repair Manual - Volumes 1 and 2 - 2nd Edition
Section
Repairs
Heating and ventilationHeater fan switch · page 2 of 2
TEST RESULTSRELATED SYMPTOMSPROBABLE CAUSEREMEDY
Discharge (high) pressure abnormally high.After stopping the compressor, pressure drops to about 200 kPa quickly, and then falls gradually.Air in system.Discharge, evacuate and recharge the system.
No bubbles in sight glass when condenser is cooled by water.Excessive refrigerant in system.Discharge, evacuate and recharge the system.
Reduced or on air flow through condenser.● Clogged condenser or radiator fins.
● Condenser or radiator fan not working properly.		● Clean.
● Check voltage and fan speed.
● Check fan direction.
Discharge pressure abnormally low.Line to condenser is excessively hot.Restricted flow of refrigerant in system.● Expansion valve.
● Restricted lines.
Excessive bubbles in sight glass; condenser is not hot.Insufficient refrigerant in system.● Check for leak.
● Charge system.
High and low pressures are balanced soon after stopping the compressor. Low side is higher than normal.● Faulty compressor discharge or inlet valve.
● Faulty compressor seal.		Replace compressor.
Outlet of expansion valve is not frosted, low pressure gauge indicates vacuum.● Faulty expansion valve.
● Moisture in system.		● Replace
● Flush and discharge, evacuate and recharge the system.
Suction (low) pressure abnormally low.Excessive bubbles in sight glass; condenser is not hot.Insufficient refrigerant.● Check for leaks.
● Discharge, evacuate and recharge the system.
● Charge as required.
Expansion valve is not frosted and low pressure line is not cold. Low pressure gauge indicates vacuum.● Frozen expansion valve.
● Faulty expansion valve.		Replace expansion valve.
Suction pressure abnormally high.Discharge temperature is low and the air flow from the vents is restricted.Frozen evaporator.Run the fan with the compressor off, then check A/C thermostat.
Expansion valve is frosted.Clogged expansion valve.Clean or replace.
Receiver/dryer is cool (should be warm during operation).Clogged receiver/dryer.Replace.
Low pressure hose and check joint are cooler than the temperature around evaporator.● Expansion valve open too long.
● Loose expansion valve.		Repair or replace.
Suction and discharge pressure abnormally.Suction pressure is lowered when condenser is cooled by water.Excessive refrigerant in system.Discharge, evacuate and recharge system.
High and low pressure are equalised as soon as the compressor is stopped and both gauges fluctuate while running.● Faulty gasket.
● Faulty high pressure valve.
● Foreign particle stuck in high pressure valve.		Replace compressor.
Suction and discharge pressure abnormally low.Reduced air flow through condenser● Clogged condenser and/or radiator fins.
● Condenser or radiator fan not working properly.		● Clean condenser and/or radiator.
● Check voltage and fan speed.
● Check fan direction.
No bubbles in sight glass when condenser is cooled by water.Excessive refrigerant in system.Discharge, evacuate and recharge system.
Refrigerant leaks.Low pressure hose and metal end areas are cooler than evaporator.Clogged or kinked low pressure hose parts.Repair or replace.
Temperature around expansion valve is too low compared with that around the receiver/dryer.Clogged high pressure line.Repair or replace.
Compressor heat damage.Compressor clutch is dirty.Compressor shaft seal leaking.Replace compressor.
Compressor bolt(s) are dirty.Leaking around bolt(s).Tighten bolt(s) or replace compressor.
Compressor gasket is wet with oil.Gasket is leaking.Replace compressor.
Black soot inside compressor and hoses.Restriction or leak in system.Flush entire system, replace rubber lines or hoses.

Parts & tools for this job For Rover 600

Links open Amazon search results in a new tab. As an Amazon Associate I earn from qualifying purchases.