First of all check to see if ur anti-freeze is good.... you will need an antifreeze tester for this job (tester is realatively cheap). Second would be to replace your thermosat (this part is fairly cheap) and an easy job to do...Thirdly would be to get your heater core checked out as it could be cracked or faulty.... this job can be a little tough depending on your make and model... these are the typical issues with any vehicle...
for heating problems...
Dansa i neon was created on 1987-04-13.
Bright Like Neon Love was created on 2004-04-05.
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Cold Asylum was created in 1994-04.
there are plenty of "How-To's" for home made CAI's (Cold Air Intake) at Neon enthusiast forums (NeonTuners.com and Neons.org are IMO the best examples)
The fuse for the cigarette lighter on a 2004 Dodge Neon is under the hood. It is fuse #14 in the power distribution center.
The factory sunroof does not have a manual close devise.
Cold Squad ended on 2005-06-04.
Cold Fear was created on 2005-04-29.
Cold Pizza ended on 2007-05-04.
Thermostat is bad
Depends where you live and how cold it gets.