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200F thermostat

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Has anyone tried a 200F thermostat on a 5.9 common rail? With winter here, I am hoping to get some more in cab heat when Idling around town. I was thinking of trying a 200f thermostat. I see some guys in the 2nd Gen forum are trying them, any experience on 3rd gens?

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If I understand the fan clutch could stay running due to water temp? is that the issue?

I think it would defeat the purpose of running a higher stat if it made the fan engage a majority of the time.JR

Unknown... :shrug: But I don't see too much issues with it. I did hear that AH64ID said something about the fan clutch?

I read this in another thread as well, never heard of reprogramming the fan engagement, hopefully he sees this and can chime in. I am curious too.:think:
  • 4 weeks later...

Just seeing this thread. The programming is based on a 190 thermostat, meaning the fan operation is also based on that. Running a 200 and not towing shouldn't be an issue, but of you do any towing you will have a lot of fan on I time. 100% fan is commanded somewhere around 215, and a 200 thermostat is going to be full open around 215-217, and like 225 when very heavy. I would really like to run a 200, but the programming isn't there. I will add that if you have heat issues with a 190 then a 200 won't fix them, you have other issues like a plugged heater core. I get plenty of hot air in the cab at -25. I do highly recommend a winter front.

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Welcome To Mopar1973Man.Com LLC

We are privately owned, with access to a professional Diesel Mechanic, who can provide additional support for Dodge Ram Cummins Diesel vehicles. Many detailed information is FREE and available to read. However, in order to interact directly with our Diesel Mechanic, Michael, by phone, via zoom, or as the web-based option, Subscription Plans are offered that will enable these and other features.  Go to the Subscription Page and Select a desired plan. At any time you wish to cancel the Subscription, click Subscription Page, select the 'Cancel' button, and it will be canceled. For your convenience, all subscriptions are on auto-renewal.