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Why is my alternator charge is very low when cold then after warm the charge is normal

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Could possibly be the built in voltage regulator weakening.
possible worn or corroded terminals, battery cable
possible faulty ground

Posted on May 08, 2014

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Are you referring to battery voltage, which may be lower when first starting, increasing with time

Posted on May 08, 2014

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I have a 1997 chevy Malibu and it runs find during the summer months, however when the temperature drops to 50 degrees or less the car wont start. when it warms up it starts. why wont the car start wh

battery is too low rating for car to start in winter. Or battery has bad cell and will hold a full charge needed to start, or the alternator is not putting out a full charge to the battery .......

Oct 14, 2014 | Cars & Trucks

1 Answer

Whining noise when extreme cold days, that goes away when my 2005 Mariner warms up. Seems to come and go until the car warms up.

Alternators can sometimes whine when start up on a cold morning, they run on full load till they get the battery back up to full charge. When the whining stops, switch on electrical equipment (Headlights, fan full boost, heated rear window) if the whining starts again its the alternator.

Jan 23, 2014 | Cars & Trucks

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Renault scenic problems 2002 53 plate 1.6 takes about 3-4 minutes to start when cold

yea sounds like a bad starter, in the cold it will not make complete contact when soleniod triggered.. this is due to worn contacts inside, when warm it makes a better contact, if you replace the starter this will solve your problem, also have the battery and alternator tested

Dec 01, 2013 | Cars & Trucks

2 Answers

At startup, amp gage low, lights flicker. belt squealing. then after warm up, gage normal no squeal. alternator bad? Use to do when blower motor on now all start ups.

Thats what it sounds like. That would cause all your problems. You could start the jeep and then take your hot side battery terminal off. If it dies asap, your alternator is bad. Hope this helps. Best of luck.

Feb 06, 2011 | 1995 Jeep Cherokee

3 Answers

When the weather is very cold (below zero) the car will not even try to turn over it wil only click at the starter and ignition no turn battery is fine never does this any other time. only cold, but once...

It is normal for batteries to lose a good deal of their power due to cold temperatures. If you want better starting power, try using a battery charger/maintainer overnight. It should charge at no more than 2 amps. The slow trickle charging overnight will charge and warm up the battery and allow it to develop full power for a cold morning start.

Feb 04, 2011 | 2005 Saturn ION

2 Answers

My 97 lincoln town car won't start. it's cold out. would taking the battery inside be a good idea to warm it up?

Your battery is usually challenged in cold weather, you are much trouble to remove to take in to warm up...Do you have a battery charger? My suggestion would be to jump start your Lincoln with another car battery...this will assure that your battery is not further damaged by being under charged in cold to assure charging system ie alternator is working...taking the battery inside to warm will help to save your battery if it is just low on charge...taking inside will not ncecessarily re-charge your the summer, sometimes leaving hood up with sun on battery will slightly re-charge a low battery...:)

Dec 13, 2010 | 1997 Lincoln Town Car

1 Answer

A/c only blowing cold air out of the passenger vents. Warm out of the drivers

check the refrigerant level a low charge will do this due to only half of the evaporator is working from low charge

Apr 18, 2009 | 1994 Acura Vigor

1 Answer

1999 Gmc Sierra not charging

Sounds like the alternator/regulator assembly is getting weak. The cold wreaks havoc with electrical equipment. Probably need to replace it prior to failure. Hope this helps.
RPM Northwest

Jan 27, 2009 | 1993 GMC Sierra K1500

2 Answers

2000 buick lesabre 3800 has warm air blowing out two driver side vents in A/C mode, but the two passenger side vents are blowing cold. any suggestions?

I had same problem on 2000 Lesabre blowing cold on passenger and warm on driver. I fixed it by adding more freon even though it had 28 pounds of preasure. Now it works great!

Jul 30, 2008 | 2001 Buick LeSabre

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