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My car blows cold air when set on heat. It has a new ...
Sent to Car Experts September 27 02:01 AM

My car blows cold air when set on heat. It has a new water pump, but the problem existed before the old one was replaced. The blower seems fine??

 

Optional Information:
1987 Dodge Dakota 3.9L

Already Tried:
Nothing yet

Customer (name blocked for privacy)
Status:  Closed   Value: $9
Info Request
September 27 2:18 AM (17 minutes and 3 seconds later)
         
REPLIED to Info RequestCheck Mark

Does it blow heat at all even after its been running for a long while?

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stin1974 -- Auto Service Technician -- 100% Positive Feedback on 103 Car Accepts
Domestic transmission diagnostics and troubleshooting. General repair diagnostics and troubleshoot.
Reply
September 27 2:23 AM (5 minutes and 26 seconds later)
         
Reply to stin1974's Post: No, it does not. When I bought it the previous owner siad it would blow warm on the low setting only. I cannot get hot or even lukewarm air out of it.
Customer (name blocked for privacy)
Info Request
September 27 2:26 AM (2 minutes and 34 seconds later)
         
REPLIED to Info RequestCheck Mark

Any problem with the car running a little hot?(engine temp) that is?

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stin1974 -- Auto Service Technician -- 100% Positive Feedback on 103 Car Accepts
Domestic transmission diagnostics and troubleshooting. General repair diagnostics and troubleshoot.
Reply
September 27 3:04 AM (37 minutes and 43 seconds later)
         
Reply to stin1974's Post: Not that I am aware of, it does not have a temp gauge. However, it has not overhaeated on me.
Customer (name blocked for privacy)
Answer
September 27 3:04 AM (17 seconds later)
         
ACCEPTEDCheck Mark
Either way, heres the firt thing you shoud try. Replace the thermostat. 9 out of 10 times when you are having this problem it is the thermostat. If Its stuck open or closed, it will either heat up to operating temp and your thermostat being stuck will not let it circulate from the engine block to heat the rest of the water that circulates throught you heater cores and hoses to allow you propper heat. The other thin is that if its stuck open then the water doesnt have a chance to heat up in the block first because its always at a constant flow right at first so it doesnt stay in the block and build up the right water temp. I would replace the thermostat and also make sure the water seems clean of debbee and sludge. If the water(antifreze) seems good go with a new thermostat. let the car run for a while in park and keep feeling the bottom hose under the thermostat. When the thermostat opens you will feel that hose start to get hot. At this point you should then have the heat your looking for. Just make sure you put the thermostat in the same way the other one came out. Just be carefull and watch what end comes out first and put the new one in the same way. If the engine temp is not overheating then I really tend to think this is your proplem.

Edited by stin1974 on September 27 2006 at 3:09 AM
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stin1974 -- Auto Service Technician -- 100% Positive Feedback on 103 Car Accepts
Domestic transmission diagnostics and troubleshooting. General repair diagnostics and troubleshoot.
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