blinn
Junior Member
Admittedly, I am not an expert on air conditioning. I have a 1999 Ram 1500 with a 4.7L. It started developing an odd behavior this summer. When I start it up I get good cold air, after I drive a couple miles it will go warm and every so often I hear this rattling sound from under the passenger side dash board. My wife was in the truck with me a few weeks and she jokingly said there’s a snake in there
That kind of gives you an idea as to the sound. I’ve never heard a noise like that in a vehicle! After it goes warm if I turn it off and back on it will blow cold again for a minute or so and then back to warm. If I let it run it will go back to cold for a short while, then warm, then cold, etc.
What should I test or what are my diagnostic steps here?
Thanks,
Brian
Sent from my iPad using Tapatalk
That kind of gives you an idea as to the sound. I’ve never heard a noise like that in a vehicle! After it goes warm if I turn it off and back on it will blow cold again for a minute or so and then back to warm. If I let it run it will go back to cold for a short while, then warm, then cold, etc.
What should I test or what are my diagnostic steps here?
Thanks,
Brian
Sent from my iPad using Tapatalk