Heating / Cooling Archives - UnderhoodService

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Auxiliary Water Pump Diagnostics

A car or truck comes into your shop with a complaint of poor heater performance- the issue may be the auxiliary water pump.

Why Does Engine Coolant Need Replacement?

Two specifications can be used to justify replacement — the condition of the additive package & the freezing point.

Engineering Better Belt Systems

An accessory drive belt is always both speeding up and slowing down.

Cabin Air Filter Replacement

There are three major reasons to replace a cabin air filter in the winter.

A/C System Manifold Gauges

A basic gauge set will have three basic components.

HVAC Diagnostics

Knowing the cause of the complaint might require looking at several components.

Overcharged A/C Systems

Your customers got hot this summer and recharged their A/C system with a DIY refill. Now what? Here’s what to look for.

Cabin Air Filters

Don’t overlook the importance of the cabin air filter in your customers’ vehicles.

Mercedes-Benz AC Service

Here’s what you need to know about R-1234yf refrigerant in Mercedes-Benz vehicles.

AC Condensers

The characteristics that make the parallel-flow condenser so efficient are among its major drawbacks as well.

Regular AC Maintenance Helps Prevent Compressor Failure

Not following the proper service procedures or compressor oil recommendations could be factors to early compressor failure.

3 Reasons To Replace Cabin Air Filters In Winter

Often driven by an “out of sight, out of mind” mentality, most consumers don’t think about purchasing cabin air filters. That’s why educating consumers on the benefits of cabin air filters can be a shop’s best sales pitch for selling these maintenance add-ons.