Question about 2000 Toyota Celica

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Heater blower works intermitantly

1999 celica vvti 140 bhp.it has manual heater controls, the fan works ok on low but when i turn it to a higher speed it somtimes cuts out all together other times its ok. if i leave it on low it seems to be ok. i have changed the ressistor that sits behind the fan but it has made no difference can anyone help me please. thanks

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If you have access to a DC voltmeter; try this:
Check for voltage on each of the heater resistor terminals, when it is unplugged, key in the on position. With the heater switch on low, you should have 3 volts DC, on lo-med, 6 VDC, hi-med, 9 VDC and on hi, 12 vdc. It looks to me like you might have a bad heater switrch, if the voltages do not match exactly what is posted above, or vary when you slightly manipulate the switch, the switch contacts are bad. Hope this helps. If not, please repost for additinal info.

Posted on Oct 08, 2008

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