What;s Wrong With My RAM Truck????
Our 2005 Ram 3500 Diesel (5.9) SRW has been a great tow vehicle for our 7-ton 5th wheel trailer. And after 150 thousand miles, three years ago we had to replace a couple of leaky hoses in our air con...
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Huntindog wrote:Iraqvet05 wrote:I cannot fathom how that could be.
I had a 2500HD that would stop blowing cold air at stop lights and at low speeds. The blower fan would still blow but the air was hot. It took me a few weeks of research but I found out the fan clutch had failed, causing the evaporator to freeze up.
A clutch that doesn't engage with enough force (normal wear failure) will not pump enough freon to freeze the evap.
One that has locked up (Not a normal occurance) will be much more likely to freeze at highway speed... In fact most systems cannot make a evap freeze at idle. They just do not pump enough freon fast enough for this to occur.
Maybe freezing up was the wrong effect but the mechanical fan clutch in that truck was weak. On hot days, at stop lights that radiator fan clutch should have been screaming but it wasn't....no air flow over the condenser meant the condenser couldn't conduct the proper heat exchange and the result was warm air in the cab.
Similar thread here...fan clutch failure
