1998 Chevy Astro blower heater switch

1998 CHEVROLET ASTRO
244,000 MILES • 6 CYL • 2WD • AUTOMATIC
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MECHMAN2007
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the problem i have is that I only have "high" on the heater fan switch, all other settings are like the switch is off. when the problem first began all settings worked altho high was intermittent now none work except high. Is it the switch or the relay? and how do I replace the broken part? thank you in advance
Dec 11, 2008 at 10:33 AM
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DOCFIXIT
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Blower resistor located behind glove box ie. under pass. side dash
Dec 11, 2008 at 3:38 PM