Skip the auto shop - Our mechanics make house calls

Q: Car won't start - 2004 Volkswagen Golf

asked by on

I just got a brand new battery and alternator put in for my car, and it still won't start. My mechanic let me know that the AC and heat unit was drawing too much energy and to keep it off, and I have been - but the car still won't turn. It sounds like it's trying when you crank it, but no spark/nothing. I was driving it a week ago just fine - with the AC and heat unit off.

A: Hello. I will help you on this. It’s unclea...

Hello. I will help you on this. It’s unclear whether you bought a new battery and a new alternator because those parts were accurately diagnosed as defective. A battery must be load tested, only after it is fully charged, in order to determine if it is defective.

An alternator must also be tested according to specific instructions in the Factory Service Manual (FSM). If these tests were not performed and a mechanic just told you to change out those parts, then you need a new mechanic. In the world of automobile technology, there is no diagnosis that refers to an AC system or a heating system that draws too much energy. The diagnosis the Mechanic gave is a bit imprecise. We can speak of electrical faults in the electrical segment of an A/C system as "drawing too much energy" but typically such will blow a fuse. At any rate, your A/C and heating systems and their energy consumption and the electrical and mechanical load they place in your engine have nothing to do with your no start condition. You may want to have the mechanic explain their findings back to you more specifically or have a second mechanic diagnose the no start for you. The mechanic can then resolve your issue by replacing only those parts that are necessary to get your car running. Given the age of your car, certain "tune-up" parts might be recommended as well such as plug wires, spark plugs, fuel filter and so forth the replacement of which will help you avoid future problems if those parts are past due for replacement.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: What will make a battery drain quickly? It doesn't happen every day but it happens 2-3 days a week.

i would suggest checking the voltage regulator. This is a unit that regulates the charging of the battery by the alternator, making sure that the battery receives the correct amount of amperage when charging. When this is not working properly,...

Q: Car will not start - 2003 Honda Accord

When it comes to a starting issue, you will want to begin with the battery. The battery can have enough power for the electronics, and not have enough power for the starter. Attempt to jump start the vehicle if you...

Q: Hey I have 2004 Honda Accord. It only runs hot whenever I cut the heat on, long as the air is on, it stays right

Hello. If the engine is overheating, but will maintain the right temperature when the AC is on, then typically that is the result of a radiator cooling fan issue. When the AC is on, one of the fans will come...

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...