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Vp Commodore, heater is on all the time cannot adjust

Tiny
MANTRACK
  • MEMBER
  • 1996 HOLDEN COMMODORE
  • 200,000 MILES
Heater is on all the time cannot adjust
Thursday, March 29th, 2012 AT 11:08 AM

6 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the blower motor relay could be sticking
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Thursday, March 29th, 2012 AT 12:03 PM
Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Heater tap on R/H/S below master cyl, may be faulty and if vacuum line off tap goes to hot, also listen for vacuum leak under dash near heater control, the switch is a vacuum switch and this can also be a problem.
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Tuesday, April 17th, 2012 AT 10:40 PM
Tiny
MANTRACK
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  • 6 POSTS
Thank guys but that does not seem to be what its problem is?
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Wednesday, April 18th, 2012 AT 9:26 AM
Tiny
MHPAUTOS
  • MECHANIC
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A bit more precise info on what the problem is, as much detail as you want.
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Wednesday, April 18th, 2012 AT 12:58 PM
Tiny
MANTRACK
  • MEMBER
  • 6 POSTS
OK, the heater seems to be on all the time, the heat/cold switch is on cold. Have changed the settings on the dial, heat still comes out.

The air feels fresh so I think the air-con is working.
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Thursday, April 19th, 2012 AT 9:33 AM
Tiny
MHPAUTOS
  • MECHANIC
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Check for vacuum at the heater tap, if the control is on cold and both heater hoses are hot, either the tap has failed or there is a problem with the vacuum side of the heater system, the main switch for heater and vent controls is vacuum operated.
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Thursday, April 19th, 2012 AT 1:15 PM

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