Odors In The A/C: How To Troubleshoot Smells
If you know someone who tells you that his or her vehicle’s air conditioner blows out air that smells like the inside of an old gym sneaker when the A/C is turned on, they are not alone.
Mercury Tech Tip: Air Conditioner Blows Warm Air
This 1999 Mercury Mountaineer had its door motor and heater door replaced, but the air conditioner still blows warm. Here’s what else it could be.
Automatic Temperature Control Sensors
When a driver sets a temperature in the control head of an HVAC system, what does it mean to the vehicle? New HVAC systems look at more than just blower motor speed, door position and the high-pressure switch voltage. These modern systems are looking at temperatures inside and outside the vehicle. They are also looking at the overall efficiency of the vehicle.
Electric Water Pump Replacement
We recently had a 2007 BMW Z4 with the N52 engine in the shop. When diagnosing a faulty electric water pump, the first thing that needs to be done is to verify if there are any water pump-related diagnostic codes. There’s a very good chance there will be some. I then like to perform a visual inspection, but don’t look for the water pump from the top of the engine. You’ll want to drop the lower panels, and you will see the pump on the lower right side of the engine.
GM HVAC Door Actuator Motors: Operation And Calibration
There are several types of electrically driven actuator motors used in today’s GM cars, and they all function differently. Keep reading for operation tips.
A/C Compressor Oils: Types, Uses And Differences
A/C compressor oil types can vary due to the compressor manufacturer, refridgerant and OEM requirements. See which oils to use for modern A/C systems.
Volkswagen: Identifying And Mixing Factory Fill Engine Coolants
Coolants G11, G12, G12+ and G12++ have been replaced by an improved version. G13 coolant is introduced on all engines.
Underhood Update On R-1234yf Refrigerant
If you haven’t had a lot of experience dealing with R-1234yf in your shop yet, get ready. You’re going to steadily be seeing a lot more of this refrigerant in the coming years. Underhood Service talked with ASE Executive Director of Special Projects Dave Cappert about R-1234yf updates and best practices techs need to know to be able to service these vehicles before one catches you off guard.
Jeep Tech Tip: Poor A/C Performance
Some Jeep Liberty and Nitro owners may complain that A/C performance is poor and that the A/C is not cooling enough or fails to keep the passenger compartment cool. This update will provide customers with improved A/C performance.
Gaskets: Ignoring And Top Off Troubles
Engine oil and coolant leaks should not be ignored. Topping off the levels is often more costly in the long run than repairing the leaking gasket or component. Advising a customer about the potential damage that can occur if they decline a leak repair is not a scare tactic, it is important that they know the real price of their decision.
Summer Vacation Insurance: Catch a System Failure Before it Interrupts Your Customers’ Travel Plans
The typical family vacation might start with a trip to your shop to get the oil changed and the vehicle inspected. Taking the extra time to inspect the belts and hoses can make for a trouble-free vacation for your customer and extra revenue for your shop, while a broken belt or burst hose can bring
Coolant Transfusion: Proper Selection Prevents System Degradation
Coolant is mostly a mixture of ethylene glycol and water, with a small percentage being solvents, additives and inhibitors – but it’s the mixing and matching of those last pieces that really determine what coolant should be used and when. There are three main coolant buckets, defined by their different additive philosophies.
