Relay to control blower speed

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merplastic

Member - Posts: 2

Joined: November 25, 2003

Location: United States

Posted: October 14, 2004 at 8:13 PM / IP Logged

I'm trying to design a circuit to control my blower speed manually for my HVAC system in an 91 vette. I bought a relay and a rheostat but, not now I'm totally confused and dont really have a clue what to do next. I would appreciate any help in this matter.

flynntech

Copper - Posts: 275

Joined: April 15, 2004

Location: United States

Posted: October 14, 2004 at 9:29 PM / IP Logged

Try a multi position switch with the resistor coils from a car in the JY.

in my car the blower swtich grounds the relay in any position other than off. Each different position routes the positive side through a different sized coil (resistor) which is inside the blower duct, probably for temp correction reasons...I'm not really sure. Anyways, the relay allows current to the motor, the switch choses different paths for it to take.

merplastic

Member - Posts: 2

Joined: November 25, 2003

Location: United States

Posted: October 15, 2004 at 9:22 AM / IP Logged

thanks flynntech. my JY is only a couple miles away.

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Relay to control blower speed

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