No heat on 1993 Ford Ranger

I put in a new thermostat, but the heater still only blows cold air.

by in Memphis, TN on December 13, 2010
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2 answers 1 comment
ANSWER by , December 13, 2010
COMMENT by , December 16, 2010
How would I go about unplugging it. Is there any valve connected to the core?
ANSWER by , December 13, 2010
grab the heater hoses at the firewall and if one feels cooler then the other just flush it out with a garden hose,reconnect the hoses then check for heat.i would buy a $4 prestone hydrometer to check for boil over and frezze over protection also.