Low or no heat

GSMITH

MEMBER
1999 SATURN SL2
4 CYL
FWD
MANUAL
170 MILES

Have a 1999 sl2. Temp sensor changed, coolant flushed, new thermostat. STILL, very little heat. Have to run recirc, or the heater core cools down and I get cool air - can't run the blower to high or same result! Temp gauge reads higher since new temp sensor installed also !

4 Replies

SATURNTECH9

MECHANIC
30,869 POSTS

So is your temp door moving when you slide it to hot?Also are both your hose's getting hot to you heater core?How hot is your temp gauge getting?

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Monday, December 6th, 2010 AT 12:18 AM

FEDROWG

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4 POSTS

You need a new heater core. Everything else is working properly but heater core is restricted which causes less hot water to pass thru the core resulting in less heat and rapid cooling.

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Monday, December 6th, 2010 AT 12:56 AM

SATURNTECH9

MECHANIC
30,869 POSTS

I would see if you only had one hot heater hose that would indicate you a flow issue thru the heater core.

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Monday, December 6th, 2010 AT 1:07 AM

GSMITH

MEMBER
2 POSTS

Thanks everyone for you tips on my heater problems in the SL2. I will try feeling for temp differences between the two hoses. But, I feel you are both right about a possible flow through issue in that core.

Thanks so much!

. Respectfully,
Gary Smith - Holyoke, MA

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Monday, December 6th, 2010 AT 3:53 AM