jjmcb

Well it's getting cold down here in Houston, and well now my heater is not hearing as it should. All research I done says it's either the core or it needs a flush. I search the threads for a while but I can't find anything. Has anyone done this, have any tips if I were to do it myself. I got a quote from my mechanic($775 ouch) he says all that he has done the flush didn't repair the problem so it will probably need a replacement heater core. 2003 F-150 screw lariat

jprevat

iTrader: (1)

Its a pain but you have to pull the whole dash. It took me a solid day taking my time to get it right. Buy the peak radiator flush and give it a go first because the core sucks.

Blckwlf

They quoted me $900 to replace mine. Being that I live in Phoenix, and considering the value of the truck, I think I'll just wear a coat and put de-icer in the washer fluid. Should be good enough for Phoenix.

boog2169

There is a good vid on YouTube for this fix.

jjmcb

Maybe I can stick it through. My biggest concern is may daughter but it works half***** so it won't be to cold for her

boog2169

Have you tried a flush? Not hard and may help.

jjmcb

No i haven't done that yet. I also ever personally done it and right now I'm short in cash to pay someone to do it. I seen videos but I also want to try an clean the core but I don't have all the tools to do it.

BossRacing71

Another possibility is that your heater core has become partially clogged with sediment. If the flush doesn't work, you might want to try blowing it out with compressed air or water. You'll want to send the air/water reversed from the normal direction of flow of the coolant.

boog2169

Just be careful on the pressure. I think these cores are rated at less than 15 psi. Too much can create a leak.

mbb

You are sur your blend door moves all way?