nlambert182
Senior Member
- Joined
- Dec 28, 2022
- Posts
- 863
- Reaction score
- 1,170
- Location
- Huntsville, AL
- Ram Year
- 2018
- Engine
- 6.7 Cummins
2018 Ram 2500
On my way into work the other morning I turned the heat on for the first time since buying the truck. On my other Rams the heat would melt you within 10 minutes. I noticed that my heat wasn't blowing as hot as my other trucks had all the way into work. The air was downright chilly.
Came home and checked the coolant level and all was fine. The coolant is really clean and looks like it was changed recently. The way this truck was maintained, I don't doubt it. It looks to be the correct coolant as well.
Yesterday afternoon I got the truck to operating temp (it's averaging 190-195 degrees) and then checked the blend door actuators and all were cycling as they should be. I stuck an infrared thermometer on each vent.
Pass window - 123 degrees
Pass center vent - 122 degrees
Driver center vent - 87 degrees
Driver window vent - 86 degrees
I hit both of the heater core hoses with the thermometer and both were reading within 6 degrees of each other.
The only thing I can think of is a partially clogged heater core. I have 2 gallons of the Mopar coolant on the way. What's the success rate of flushing the heater core? I'm going to give it a shot this evening and try to get some heat back to the driver side. Any tips that I need to know before I knock this out? As an aside, I am going to flush with a standard garden hose and if needed I can turn down the regulator on my air compressor and send some lower pressure air through it as well.
On my way into work the other morning I turned the heat on for the first time since buying the truck. On my other Rams the heat would melt you within 10 minutes. I noticed that my heat wasn't blowing as hot as my other trucks had all the way into work. The air was downright chilly.
Came home and checked the coolant level and all was fine. The coolant is really clean and looks like it was changed recently. The way this truck was maintained, I don't doubt it. It looks to be the correct coolant as well.
Yesterday afternoon I got the truck to operating temp (it's averaging 190-195 degrees) and then checked the blend door actuators and all were cycling as they should be. I stuck an infrared thermometer on each vent.
Pass window - 123 degrees
Pass center vent - 122 degrees
Driver center vent - 87 degrees
Driver window vent - 86 degrees
I hit both of the heater core hoses with the thermometer and both were reading within 6 degrees of each other.
The only thing I can think of is a partially clogged heater core. I have 2 gallons of the Mopar coolant on the way. What's the success rate of flushing the heater core? I'm going to give it a shot this evening and try to get some heat back to the driver side. Any tips that I need to know before I knock this out? As an aside, I am going to flush with a standard garden hose and if needed I can turn down the regulator on my air compressor and send some lower pressure air through it as well.