Bottom heater hose does not get hot?

LAWRENCE515

MEMBER
2005 CHRYSLER 300
3.5L
V6
2WD
AUTOMATIC
100,000 MILES

I turn the heat on in my car and it doesn't get hot. The two heater core hoses get hot, and the top hose get hot but the bottom one does not get hot. So, l think it could be the thermostat.

Friday, September 23rd, 2022 AT 11:52 AM

3 Replies

MIKE H R

MECHANIC
3,094 POSTS

The problem could be that the heater core is blocked, with one getting hot and the other staying cold. You can back flush the heater core each way a couple of times to try to clean it out with a water hose.

Mike

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Friday, September 23rd, 2022 AT 4:33 PM

LAWRENCE515

MEMBER
2 POSTS

The 2 heater core hoses get hot the top hose get hot but the bottom hose does not get hot.

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Sunday, September 25th, 2022 AT 7:07 AM

MIKE H R

MECHANIC
3,094 POSTS

The heater core over time, they are known to clog and fail. If you have a heater core that is clogged, it’s not going to be able to pass coolant through. Without the warm coolant going through it, there can be no heat. You can switch the hoses to the heater core to see if there is a blockage. Do it when the car has not been running or hot.
Let us know what you find.

Mike

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Monday, September 26th, 2022 AT 8:57 AM