Auxiliary Water Pumps – How One Component Can Upset Your Cooling System Diagnostic Logic
A Mercedes comes into the shop with a complaint of poor heater performance. The driver says during cold mornings that the heater will blow cold while he’s driving to work during rush hour traffic. The car is not overheating and the air is coming from the correct ducts. Your first reaction might be to install a new thermostat and inspect the heater core for a blockage. During a test drive, the system may perform great for you. Is the customer just cold blooded?
Lessons in BMW Variable Capacity A/C Systems
Despite the many advances in A/C systems during the past 10 years, it’s important for technicians to understand basic theories of operation. Understanding how a system moves heat from the confined space of the passenger compartment and dissipates it into the atmosphere will assist the technician in analyzing system failures and performing the required maintenance
Under the Hood: Surprises in the Air – Servicing A/C Systems
As vehicle owners in many parts of the country begin using their air conditioning systems for the first time this year, some will be surprised to find their A/C
system is not functioning properly or isn’t blowing out cold air like the summer past.
Foundations for a Functioning Cooling System
Adapted from Counterman
Solving Intermittent Overheating
New cooling systems anticipate and influence changes in coolant temperature.Â
Long-Life Coolants Explained
Cooling systems and chemistry have changed a great deal since the mid-19th century, and the need for coolant has also been on the rise in today’s modern engines.
Antifreeze: The Forgotten Automotive Fluid
As winter weather approaches, motorists should be checking the level, strength and condition of the antifreeze in their cooling systems.
Engine Coolant Temperature Diagnostics
While old-school cooling system service often Âfocused on coolant leaks and overheating engines, let’s begin thinking “new-school” by looking at modern cooling systems through the eyes of the engine coolant temperature (ECT) sensor.
Aftermarket Division of Bosch Launches EV Training Tour
The course will instruct up to 20 attendees per eight-hour workshop across the United States over the course of 20 weeks.
Testing A/C Or Heater Blower Motor Circuits
The heat eventually burns out the blower motor resistor, and, in many cases, causes the electrical connector to melt.
