My heater isnt working very well..

[oldblue1968chevy]

I drive the truck in my sig to school every moring...well 30* temps arent making me happy..the heater blows just a lil bit..but its not very hot at all, and its not alot of air comming out. whats my problemo?

thanks john!

[463]

pull the heater hose's off and flush the heater core with water bottom first then the top till you get a clear stream of water. then reinstall the hoses. you may want to check your "T" stat (should have a 195f) and a good rad cap 15-16lbs and a good rad level. you could also make sure that the heater door is ajusted as to not let cold air in.

[oldblue1968chevy]

463 where is all of this located...I have no idea what or where your talking about these things are lol.....im very new to the world of trucks just barely 16 but have the tools space (time and patience run scarce sometimese lol)...but thanks!

[WorkinLonghorn]

Could be the fan too. I had to replace the brushes on the motor on mine. A little light oil on the bearings every 40 years or so works wonders too.

[smoked68]

I replaced my heater core last year and in the process cleaned out the ductwork. There was 40 years worth of leaves and what looked like a mutant rat nest...anyway heats great now and blows super...I'd start there.

[smoked68]

OH and get you a Chiltons or Haynes book on our years. Advance auto etc. have em. Good luck.

[knsmodels]

could be something as simple as low coolant level.......check that first.....

[Indyuke]

Like kns said. Check the simple things first. Check for enough water in the radiator. Check the heater hoses with the truck warmed up to see how warm they are. They should be too hot to touch.

When I first got my truck it did the same thing as yours. Barely warm air. Turns out someone had took the thermostat out and never put a new back in.

The cooling system worked great. So good in fact that the engine ran very cold. Could barely defog the window.

To find the thermostat just follow the top radiator hose over to the engine. Where it connects to the engine is the thermostat housing. Take off the thermostat housing and the thermostat will be sitting right in there. Some water will drain out when you take it apart, and you need a new gasket to put it back together. Just make sure you have a new gasket when you go to put it back together.

[ERASER5]

A new fan motor is about $20 at AutoZone. P102 is the part no. I used.

If you change the fan motor, get a vacuum cleaner and some kind of smallish hose (about 1-1/2") and push into the housing and suck out the trash. This should help a lot. I pulled a big pile of trash out of mine.

[Sport/Truck]

Originally Posted by oldblue1968chevy

463 where is all of this located...I have no idea what or where your talking about these things are lol.....im very new to the world of trucks just barely 16 but have the tools space (time and patience run scarce sometimese lol)...but thanks!

This is the heater/blower box. The hoses come in from the motor & out to the radiator or back to the motor if your radiator has been changed.
s/t

[68gmsee]

Originally Posted by Sport/Truck

This is the heater/blower box. The hoses come in from the motor & out to the radiator or back to the motor if your radiator has been changed. s/t

If I remember correctly, there's one bolt on passenger side bottom that's he// to get out. Anyone figured out how to get it out without having to remove the wheel well?

[passthebuck]

I changed my heatercore & the hose bung on the old one was plugged solid with what looked like minerals (calcium?) It's as hot as an oven in my truck now. It is time/money well spend changing the heatercore & cleaning out the mung in the box. Dont forget to seal up where the bungs exit the heaterbox. There were foam seals there at one time, but they have usually turned to dust long ago. I havnt found an easy way to get that bottom bolt out. Mabe hire Vern Troyer for an hour?

[oldblue1968chevy]

alritey..well, I figured out what was wrong, you have to have the 'air/fan' on for it to blow hot...DUHH lol..but its still not comming out very hard..its hot..but not very breezy lol..

thanks!

[BarryB]

Then you might want to pull your fan out and clean it out and to also check to make sure the motor isn't partialy seized. Pull the fan out and vacuum out the duct work what you can anyways.

[69long"n"low]

If you do any thing with your cooling system just make sure you top it up with antifreeze or you'll crack your block.

[67mater]

WD-40 the switch at the fan control (behind face ) it often gets bound and won't kick to high. Again; simple first.

[smoked68]

I used a shop vac and a leaf blower to clean mine out...messy but it works. Blowin so hard now I have to wear my helmet when the heater is on...