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Heater blowing smelly cold air

Tiny
BMW1S
  • MEMBER
  • 2005 BMW X1
  • 2.0L
  • MANUAL
  • 108,000 MILES
Heater won’t get hot just blows cold air and has horrid smell.
Wednesday, February 12th, 2020 AT 12:36 PM

7 Replies

Tiny
JOETECHPRO
  • MECHANIC
  • 705 POSTS
Hey BMW1S,

Can you please check you engine coolant level?

Let us know what you find here.

Regards, Joe
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Wednesday, February 12th, 2020 AT 5:35 PM
Tiny
BMW1S
  • MEMBER
  • 4 POSTS
Hi, it is full up?
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Wednesday, February 12th, 2020 AT 6:39 PM
Tiny
JOETECHPRO
  • MECHANIC
  • 705 POSTS
Hey BMW1S,

Does the engine temperature gauge reach operating temperature (needle in the center)?

From cold if you start the engine and remove the coolant expansion tank cap, look inside, do you have a steady flow of coolant into the bottle from the radiator return?

Regards, Joe
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Thursday, February 13th, 2020 AT 8:17 AM
Tiny
BMW1S
  • MEMBER
  • 4 POSTS
Thanks for your responses everyone. I will use this advise and look over weekend. Could it be blocked?
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Thursday, February 13th, 2020 AT 9:51 AM
Tiny
JOETECHPRO
  • MECHANIC
  • 705 POSTS
Hey BMW1S,

You are looking for circulation in the expansion tank which will show that you have a functioning water pump.

The potential other problems you could have is a blockage in the flow to the heater core inside the vehicle or could also have a problem with the heater valve the controls the flow. The interior blend motor could also be bad.

Let us know what you find with the water pump test.

Regards, Joe
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Thursday, February 13th, 2020 AT 12:53 PM
Tiny
BMW1S
  • MEMBER
  • 4 POSTS
Thank you Joe.

Thanks for taking time to help me try diagnose the problem. I will look into it tomorrow.
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Thursday, February 13th, 2020 AT 1:26 PM
Tiny
JOETECHPRO
  • MECHANIC
  • 705 POSTS
Hey BMW1S,

How did you go with checks on your heater issue?

Regards, Joe
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Sunday, February 16th, 2020 AT 10:00 PM

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