2nd Gen Non-Engine/Transmission No Heat!!!

[DennisDuncan]

Hey fellas, I have a 1996 2500 4x4 and it came out of florida. I live in ohio and this winter the thing wouldn't put out hardly any heat. The blower works fine but the air is just barely warm. The motor itself doesn't heat up too well either, I've replaced the thermostat with a factory one too. My others will get good hot heat at about 140 degrees, this truck warms up past that but still doesn't produce good heat. Any ideas??? Thanks

 

[GCroyle]

Dennis,



I don't have any real go there type suggestions to get heat in your Buckeye CTD, but I did watch a tech use a non contact infrared thermometer to shoot the hoses, t-stat, and every possible spot he could shoot that thing on to get the numbers for what's hot and what's not, it was on a 7. 3L and he diagnosed it in minutes and he got it right.



I was so impressed, I bought one for my own troubleshooting.



Good luck.



Former Cuyahoga County Buckeye.

 

[BDaugherty]

Check your vacuum supply to the HVAC controls. I don't know the inner workings of the Dodge HVAC system, but there are two basic ways that heat can work.

1. A valve controls the flow of coolant through the heater core.

2. Air is directed either through the heater coil or through the evaporator coil.

If your controls or actuators are sticking, you would see a problem like you are seeing. This could also affect how your A/C works.

 

[WilliamJones]

Make sure your blend doors are operating correctly. There is a heater defrost door and a blend door. If they do not work correctly you will get little or no heat. You can also check the temp of your supply and return hoses that provide hot water to heater coil. If the supply hose is hot and the return hose is noticably cooler, you may have a blocked hose.

 

[Beach]

I had a no heat issue for 2 winter's. This winter I couldn't take it anymore and started checking everything, blend door, vacuum, thermostat the year before, flushed heater core. Couldn't find a thing. I took it in to a small shop, and found out the heater core was indeed plugged. After a good size bill and a new core, I had HOTT heat. Hope this help's or I should say hope it's easier than a core and cheaper! Good luck!

 

[Houser]

My 2 cents
I had low heat issues this winter and was about to tackle puting in a new heater core. A guy from the auto shop where I work recommended blowing out heater core with a garden hose. I tried it and it worked great. I just unhooked the heater hoses from the block hooked each end in turn directly to the hose with a coupler and blew it out about 30 seconds each way. hooked them back up to the block, added about 2 cups of strait antifreeze to dilute the water in the core and I was off and running with heat in about 20 minutes.

Houser