Mercedes-Benz Auxiliary Water Pump Diagnostics
A Mercedes comes into your shop with a complaint of poor heater performance. The driver says on cold mornings the heater will blow cold during the drive to work in 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
VW HVAC Service
Volkswagen HVAC systems have come a long way.
Tech Tip: Cold Temps Set DTC On Some GM Vehicles
Some GM customers may find that their vehicle’s malfunction indicator lamp (MIL) illuminates after starting the vehicle when using the engine coolant heater in very cold ambient temperatures.
Tech Tip: Mazda Leak From Rear Heater Pipe
During winter driving, especially in the 23 “Salt Belt” states, water containing salt may accumulate in the black plastic pipe cover and/or the brackets of the wheel housing. This may cause corrosion and perforation of the rear heater pipe, resulting in coolant seepage from the rear heater pipe.
Tech Tip: Honda Fit’s HVAC Blower Motor Works Only On High Speed
Applies To: 2009-’10 Fit – All 2011 Fit – From VIN JHMGE8…B5000001 through JHMGE8…B5000012 2011 Fit – From VIN JHMGE8…BC000001 through JHMGE8…BC012605 Symptom: The HVAC blower motor works only on high speed. Probable Cause: Excessive current draw from the HVAC blower motor causes the blower resistor to fail. Corrective Action: Replace the HVAC blower motor
Tech Tip: Toyota Highlander’s Heater Goes from Hot to Cold on its Own
A loose control knob potentiometer could cause erratic behavior on a Highlander climate control system.
Cadillac Ciel Concept Celebrates the Journey
The spacious and elegant concept car Ciel is powered by a twin-turbocharged version of the 3.6-liter Direct Injection V-6 engine, paired with a hybrid system using lithium-ion battery technology. The Ciel – pronounced “C-L,” the French translation for sky – is a four-seat convertible that opens a new chapter in Cadillac’s design and product ascent, pushing the brand’s Art & Science philosophy into a new stratum.
Tech Update: HVAC Diagnostics
Leave it to the OEMs to take a simple system like heating and air conditioning and turn it into an electronic jumble of wiring, sensors and computer components.
Tech Tip: Heater Core Electrolysis/Leakage
The majority of repeat heater core leaks are due to high flow rate or use of poor quality coolant. However, electrolysis should also be checked, especially when repeat repairs have occurred.
Tech Tip: Mazda Seat Heater Needs a Boost
Some Mazda6 drivers may complain that the seat warmers turn off too early or may not heat to their satisfaction. The operating temperature of the new seat warmer has been increased on later vehicles by 14 degrees F (on average) to address this concern.
BMW Climate Control Diagnostics: Resolving Any Cooling System Problems First Speeds Repairs
First Speeds Repairs There was a time when the heating and ventilation system on most cars was simple. A three-position switch, a couple of levers and maybe some separate vents that would allow outside air to enter the passenger compartment. Times have changed and today’s car buying public wants to dial in a desired temperature
Tech Tip: Wintertime Heater Operation Guidelines
Wintertime heater operation presents numerous questions and problems. Here are some guidelines for professional technicians to ensure the heating efficiency of their customers’ vehicles when the weather turns cold. Verify coolant level and condition. If the system is low, the heater core is the first to lose coolant flow, causing a lack of heat in the passenger compartment. Old coolant can cause ….