Heater Output Temperature Check

Air Temperature:

TEST DESCRIPTION
When the engine is warmed up (after approximately 20 minutes of operation), the vehicle should be driven. An accurate thermometer should be used to determine the temperature of the outside air and the temperature of the air discharged at the floor outlets with the vehicle being driven at 48 km/h (30 mph). Minimum acceptable heater output temperatures at four different outside air temperatures are shown in the table below

Minimum acceptable heater output temperatures for outside air temperatures other than those shown can be approximated by using the Fahrenheit scale and rounding off the outside air temperature to the nearest 5 °F. For every additional 5 °F of outside temperature, an additional 1.8 °F of heater output temperature should be allowed when the outside temperature is below 50 °F an additional 1.6 °F of heater output temperature should be allowed for every 5 °F of outside temperature when the outside temperature is above 50 °F.