I can't tell you how much I appreciate everyone's feedback, including those
who have e-mailed me directly. I have pulled out the t-stat. I had the same
thoughts and am going to just put a new stainless steel one in. As it turns
out, the current t-stat looks like it was working just fine.
I am going to purchase a manual to find out what where all of these parts
are so I can inspect it the way you mention.
MW
<putt@webtv.net> wrote in message
news:9626-438C6540-928@storefull-3275.bay.webtv.net...
> >The best way to test a thermostat is to
> > place it in a pot of boiling water on the
> > stove.
>
> Yes that test will work, but if you intend to go through the trouble of
> taking the t-stat out, why not just put in a new one? Cheap insurance!
> If the heater hoses are hot, once the engine is warm, maybe the blend
> door not functioning and/or the core is leaking/clogged. The hinges on
> those doors have the nasty habit of breaking. Your truck is 10+ yrs
> old. The lifespan of the core is right around 10yrs. Check the
> operation of the blend-door actuator. If it is cable operated, unhook
> the cable and manually turn the lever....the only sound you should hear
> is a quiet 'thump' when the door closes off the heater core part of the
> plenum. The better way to tell is to remove the heater-core cover in the
> plenum and check the door for proper operation.....with that cover off
> you can also tell if the core is a leaker too. A new core and t-stat is
> under $50. Once they are replaced you are good for another 10yrs or so!
>
> Hope this helps some.....
>
> Dave S(Texas)
>
Linear Mode
