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2005 Acura MDX Heat doesn't always work.

Tiny
BINGALSBE
  • MEMBER
  • 2005 ACURA MDX
  • 3.5L
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 150,000 MILES
The heater in my car doesn't always work. It seems to work about 50% of the time. I can normally turn the car off and back on and it may work. It's blows fine just doesn't get hot. It almost seems like it's all or nothing. When the heat is working it's all heat unless I turn it all the way down. Back in the spring I replaced the Front Blower Motor Power Transistor and blower fan because the A/C fan quit working.
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Thursday, December 5th, 2013 AT 5:22 AM

2 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Make sure the coolant is full in the engine. Also, with the engine hot, the heater on, feel both heater core hoses and let me know if both are hot. Finally, if both are hot, check the blend air door near the heater core to make sure it is working properly.
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Thursday, December 5th, 2013 AT 5:49 AM
Tiny
HONDATECH1983
  • MECHANIC
  • 109 POSTS
Make sure the air mix motor under the right side dash is working when you turn the air from cold to hot.
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Thursday, January 23rd, 2014 AT 7:04 PM

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