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Unread 11-28-2012, 02:48 PM   #1
Grizzly944
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1999 XJ Cherokee 
 
Join Date: Aug 2010
Location: Central,CT
Posts: 59
Heat doesn't work, in the winter of course. HELP!

So my heat does not work, and neither does my A/C. I just replaced my radiator because it was leaking. My Accessory fan does not work anymore. I have a light colored smoke coming from my vents when the vehicle warms up, and when on the highway. Even with the A/C and heat are off. It smells pretty bad. I have read that it could be the heater core, but i've checked out the floor board and its not wet. So if anyone can recommend anything, without me removing the whole dash to fix the heater core that would be awesome! Thanks, and sorry for the paragraph.

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Unread 11-28-2012, 03:00 PM   #2
jeepkid03
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Location: Storrs, CT
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A good heater core flush (back and forth) makes a big difference. Lots of crap can build up in there. I used Prestone Radiator flush and it helped. Then a local vintage car guy suggested using Cascade dishwasher soap (the gel kind) and it really cleaned lots of stuff out of the heater core. My heat works much better.

I would try that to get any crap out of the core first. You may have a leak though. Also, does your accessory fan not work due to a bad relay, fan motor, or sensor?

The temp sensor might not be reading correctly which won't turn the fan on at the right temp.

Where in CT are you?
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Unread 11-28-2012, 03:40 PM   #3
rayxjs
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Join Date: Aug 2012
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My 99 sport heats but don't use it because it smells like exsuoust , live in Pa turn it on for a few min then shut it off , just to take the chill out in the morning.any one heard of this.

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Unread 11-28-2012, 04:03 PM   #4
AZ Jeff
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Quote:
Originally Posted by Grizzly944 View Post
So my heat does not work, and neither does my A/C. I just replaced my radiator because it was leaking. My Accessory fan does not work anymore. I have a light colored smoke coming from my vents when the vehicle warms up, and when on the highway. Even with the A/C and heat are off. It smells pretty bad. I have read that it could be the heater core, but i've checked out the floor board and its not wet. So if anyone can recommend anything, without me removing the whole dash to fix the heater core that would be awesome! Thanks, and sorry for the paragraph.
If the core is confirmed to be leaking, there is NO WAY to remove it without taking the dash apart to gain access to the heater box and then remove it to remove the core.
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Unread 11-29-2012, 06:54 AM   #5
Grizzly944
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1999 XJ Cherokee 
 
Join Date: Aug 2010
Location: Central,CT
Posts: 59
Quote:
Originally Posted by jeepkid03 View Post
A good heater core flush (back and forth) makes a big difference. Lots of crap can build up in there. I used Prestone Radiator flush and it helped. Then a local vintage car guy suggested using Cascade dishwasher soap (the gel kind) and it really cleaned lots of stuff out of the heater core. My heat works much better.

I would try that to get any crap out of the core first. You may have a leak though. Also, does your accessory fan not work due to a bad relay, fan motor, or sensor?

The temp sensor might not be reading correctly which won't turn the fan on at the right temp.

Where in CT are you?
Thanks, i'll give that a try. And im far away from storrs haha, Plainville
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a/c , heat , heater core

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