I have replaced thermostat. One water line from heater core is hot, other is not.
Apr 23, 2021 at 1:27 AM
I have no hot air in my vehicle
1999 DODGE DAKOTA
NICKIDOUGLAS
- MEMBER
- 7 POSTS
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Hi,
If only one heater hose is getting hot, the heater core is likely plugged. The heat or A/C in the vehicle is controlled via a cable attached to a blend air door. That is what ultimately determines the air temp entering the vehicle. However, if the heater core isn't hot, that trumps the blend door.
So, what I suggest is to flush the heater core to see if you can get water to flow through it.
Drain the cooling system low enough to prevent the coolant from leaking through the heater hoses. Disconnect the hoses first. Then, use a garden hose and try to spray water through one of the two heater hoses. If water comes out, reverse flush it by spraying water through the other hose.
Also, here is a link you may find helpful. It covers all types of possible causes related to no heat.
https://www.2carpros.com/articles/car-heater-not-working
Try this and let me know the results.
Take care,
Joe
If only one heater hose is getting hot, the heater core is likely plugged. The heat or A/C in the vehicle is controlled via a cable attached to a blend air door. That is what ultimately determines the air temp entering the vehicle. However, if the heater core isn't hot, that trumps the blend door.
So, what I suggest is to flush the heater core to see if you can get water to flow through it.
Drain the cooling system low enough to prevent the coolant from leaking through the heater hoses. Disconnect the hoses first. Then, use a garden hose and try to spray water through one of the two heater hoses. If water comes out, reverse flush it by spraying water through the other hose.
Also, here is a link you may find helpful. It covers all types of possible causes related to no heat.
https://www.2carpros.com/articles/car-heater-not-working
Try this and let me know the results.
Take care,
Joe
Apr 23, 2021 at 1:55 PM
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