94' 239 2wd
Heater doesn't blow very hot air at all. It blows warn enough to only wear one pair of gloves while driving, but will not get HOT in the cab. The blower works good and the heater coil doesn't leak inside the cab. Any suggestions?

 

It could be a partially clogged heater core. Also, there are two lines going to the heater core (located on the drivers side firewall, kinda near the center) hot?

Just a question, what does the coolant temperature look like when you think the heater output should be hot? Is the top coolant hose hot?

If you haven't done so in a while (usually recommended every 30,000 miles or 2 years), it might be a good idea to flush the cooling system (radiator, block, and heater core; also replace heater hoses and thermostat is needed).

 

The top radiator hose does get hot, but the top heater hose is barely warm. I recently put in a new radiator and thermostat and the lines seem to be in good condition.

Should I flush the beater core? Does it need a new one?

 

I would try flushing the heater core. Of course, like I said, when doing that, I would also flush the rest of the system as well. (But do the heater core seperatly, so it doesn't get more plugged with other crap)

 

do a reverse flush on the heater core seperate from rest of system. To do this first determine which line is in and out of heater core. Disconnect both hoses for heater core on the engine side of firewall so hoses are still attached to the heater core but not to rest of system. Buy a garden hose repair kit at hardware store the metal kind with barbed end that inserts into the hose and is female screw connector. Install this gadget on output side of heatercore and hook a hose to it. Turn on water and it will back flush the heater core and spit the garbage back out the (normally) inlet side.

Either that or buy a new heater core... The above works very well and is cheaper solution.

 

A two minute flush is all it took. I just flushed the heater core out with an air hose and it puked out some dirty yellow water and the heater works great now. Thanks

 

Glad to hear it was something simple.

 

Next question, I moved from Cincinnati to Denver. Does the intake system need adjusting for the higher altitude?

 

nope the computer should beable to keep up with the adjusting altitude..if you do have problems just disconnect the batter and let the computer reset it self.

 

This worked for me in my 94' Dakota, and i dont know if it'll work, but its worth a shot. I drove for about a year and a half with no blower motor in my truck. I did find that when I drove, the air being pushed into the engine compartment was enough to push the heat through the vents. Long story short, after I finally got it fixed, I noticed it got alot warmer in the cab by not having the fan on too high. It seemed the higher it was on the more it would cool the heated air off. Try lowering your fan speed and i'll bet you'll get warmer air through the vents thus making your cab warmer. Hope this helped.


Edit:Wow I was late on that one....sorry i'll shut up now. Thats probably what I needed to do in my 94'. lol