heater blows cool air
Thread Starter
|
New User
Joined: Dec 2012
Posts: 17
Likes: 0
heater blows cool air
O.k. so I took the dive into a new heater core, as the heater was not getting hot. These are the things I did while on my adventure.
1. Before reinstalling the hoses, I blew thru them to make sure of no clogs...water flew out the other hose..no problem..no clog.
2. inspected mix door not cracked or broken...no problem
3.actuator opens and closes ok, I assume, I can hear the motor run and the door thump closed...no problem
4. water and anti freeze level good....no problem
Start vehicle,let warm up, turn on heat.....No Heat...hmmm
5. check hoses at core, one is hot ,the other is not....Problem...
any suggestions?
97 f150 4x4
1. Before reinstalling the hoses, I blew thru them to make sure of no clogs...water flew out the other hose..no problem..no clog.
2. inspected mix door not cracked or broken...no problem
3.actuator opens and closes ok, I assume, I can hear the motor run and the door thump closed...no problem
4. water and anti freeze level good....no problem
Start vehicle,let warm up, turn on heat.....No Heat...hmmm
5. check hoses at core, one is hot ,the other is not....Problem...
any suggestions?
97 f150 4x4
Fleet Mechanic
Joined: Apr 2008
Posts: 1,724
Likes: 2
From: Vancouver BC Canada
I'll bet your heater control **** isn't actually turning the control shaft. Grab the temperature **** and pull it off. Check the inside of the **** - is the indexed part broken? Check the white plastic shaft the **** mounts on, is it stripped? on my truck, the problem was a stripped shaft. Using needle nose pliers, I was able to turn the shaft and -low and behold- heat. The next step was then to replace the heater panel assembly.
Keep us posted.
Keep us posted.
Thread Starter
|
New User
Joined: Dec 2012
Posts: 17
Likes: 0
I have thought of that, but have not checked it yet. To the best of my knowledge, over 200,00 mi. and I have never replaced it
Thread Starter
|
New User
Joined: Dec 2012
Posts: 17
Likes: 0
I'll bet your heater control **** isn't actually turning the control shaft. Grab the temperature **** and pull it off. Check the inside of the **** - is the indexed part broken? Check the white plastic shaft the **** mounts on, is it stripped? on my truck, the problem was a stripped shaft. Using needle nose pliers, I was able to turn the shaft and -low and behold- heat. The next step was then to replace the heater panel assembly.
Keep us posted.
Keep us posted.
Hotshot
Joined: Jan 2004
Posts: 19,760
Likes: 1,078
From: St Louis
Trending Topics
Thread Starter
|
New User
Joined: Dec 2012
Posts: 17
Likes: 0
I did not pull the water pump because it does not run hot the temps are good. With that said, it acts like maybe not enough circulation pressure to push thru the core being the hoses circulate from the back of the engine. hmmm....
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Ford Super Duty: 5 Things Owners LOVE, 5 Things They LOATHE!
Joe Kucinski
Every 2026 Ford Truck Engine RANKED from WORST to FIRST!
Michael S. Palmer
