Skip the auto shop - Our mechanics make house calls

Q: Ventilation system seems to have some issues

asked by on

Hey there. As you probably can see I have a 2003 Grand Marquis. Currently the air is working, however, the air is only coming out of the defrost front ventilation fans and the floor fans. On top of this, the a/c is currently not functional and I have double checked coolant levels to insure that's not the issue. I would like some guidance as to what may cause this or what might be the root cause of the error. Any guidance would be greatly appreciated.

Thank you,

Nathaniel

My car has 170000 miles.
My car has an automatic transmission.

A: Hello. It sounds like you have two separate...

Hello. It sounds like you have two separate issues going on here. The vent issue comes from the lack of engine vacuum making it to the interior control system. Most of the time this is as simple as finding the faulty hose or valve under the hood.

As for the AC, this can be caused by a number of things so the system pressures needs to be checked first and then a full diagnosis would need to be done to see if the issue is as simple as low refrigerant or an electrical issue. If you are planning on having your AC system repaired, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose your AC system and advise you on repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Shifter not changing gears

This is a common issue. The shifter in the car is connected via a cable to the actual lever on the transmission. The cables usually use a plastic clip to hold them in place. Over time the clip breaks and...

Q: Engine erratic behavior, misfiring hard starting every now and then

Engine misfires can be caused by many different problems, but there are a few suspects that occur more than others. Generally, misfires are caused by either a spark or fuel issue or in cases, a combination of both. Spark related...

Q: Starts, runs, and then stalls after about 10 minutes with new battery and alternator

Hello. This may be a sign of a failing ignition coil. As you may know, an ignition coil is made of a series of coil windings that generate current that is held and then transmitted to the spark plug wires...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...