SOURCE: Heater/AC control
sounds like the contacts are worn and it is arcing . remove the switch far enough to inspect the contacts and see if there isn't a burn mark on it.
SOURCE: merc c class heater problems centre blowing cold and sides hot
Bad vacuum pod, try using a mini vacuum and the on the valve block behind the glove box take suction on each one till you find the bad one.
SOURCE: 2002 buick heater control
Usually a sign of a faulty blend door under the dash. You should have someone check the blend doors to see if they are working correctly.
SOURCE: defrost, heater, vent switch isn't switching the control to a differnt source
There is a small vacuum hose that runs along the front of the throttle body.Usually gets brittle and brakes .This runs to the passenger side of the firewall this goes to the heater box.without vacuum the valve under the dash can not switch.I hope this helps
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2008 Hyundai accent
2008 hyundai accent heater control switch not working .
The switch for the blower motor? Or something else, be specific please.
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