Heater blowing cool air through floor and dash. According to, "Heater Treater", I have a blend door issue. The bd is inside the dash, just left of the glove box area. HT has a better quality metal door for a little over one hundred bucks.

 

That's probably it, it's a common problem with our trucks. I know it's coming soon for me but I'm gonna stall and just the ***** alone for now lol

 

yep. blend door.

are you full on coolant? check the simple stuff before you spend the dough on bigger stuff

 

Yep. Coolant level is good and clean. I'll dig into it tomorrow and take some diy pics as I go.

 

Well I took the dash apart only to find the blend door functioning properly. Put the dash back together and did a radiator flush by pouring the Prestone flush in and driving around for the day. Then I took the 2 hoses off at the firewall and blew out the core with air. From that point I ran water through the system. The fluid was filthy!! Repalced with 50/50 antifreeze and distilled water. Results are, run you out heat even on low setting!!

 

So did that solve your problem?

If it didn't try the dash module. I had a similar problem and picked up a new control unit from a scrap yard and it solved my problem.

 

Yep. This problem is solved. Awaiting the next adventure, hopefully later than sooner.