Heating not working properly

Tiny
WAYNO123
  • MEMBER
  • 2005 DODGE CARAVAN
  • 3.3L
  • 6 CYL
  • AUTOMATIC
  • 120,000 MILES
No heat when outside temperatures are really cold. When the engine warms up I do get heat if I really step on the gas. Sometimes when I let my foot off it goes back to cold air. I changed thermostat and coolant. No help.
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Wednesday, December 28th, 2016 AT 7:22 AM

12 Replies

Tiny
SATURNTECH9
  • EXPERT
The two small hoses going into the heater core at the firewall when the engine is at operating temp. Are they both getting too hot to hold?If one is but the other isn't the flow in the heater core is restricted. Do you know if coolant stop leak has ever been used in the radiator?
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Thursday, December 29th, 2016 AT 6:57 AM
Tiny
WAYNO123
  • MEMBER
Both hoses are hot. Stop leak never used. Thanks. Im leaning toward the water pump.
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Thursday, December 29th, 2016 AT 7:00 AM
Tiny
SATURNTECH9
  • EXPERT
Are both getting too hot to hold?The water pump is a Kong shot if the pump wasn't circulating enough coolant I would think you would be having overheating issues.
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+1
Thursday, December 29th, 2016 AT 8:26 AM
Tiny
JOHNNY G.JR
  • MEMBER
Has cooling system been back flushed since new? Not drained and refilled.
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Thursday, December 29th, 2016 AT 8:15 PM
Tiny
WAYNO123
  • MEMBER
Not flushed. Only drained and refilled. Temp not going all the way up now. Only halfway. I thought that was due to the ice cold temps outside but not that its warmed up a little outside, engine temp not going up to normal. Ugh!
Thanks for your help
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Friday, December 30th, 2016 AT 4:41 AM
Tiny
SATURNTECH9
  • EXPERT
Maybe you got a bad new thermostat
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+1
Friday, December 30th, 2016 AT 5:49 AM
Tiny
WAYNO123
  • MEMBER
It's happened before on another car. Thanks for all your help. Happy New Year.
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Friday, December 30th, 2016 AT 1:05 PM
Tiny
JOHNNY G.JR
  • MEMBER
Thermostat has my vote also
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Friday, December 30th, 2016 AT 7:27 PM
Tiny
SATURNTECH9
  • EXPERT
That's to check if a thermostat isn't opening sounds like the thermostat is allowing flow when it shouldn't. Like a bad seal or partially stuck open.
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Friday, December 30th, 2016 AT 11:21 PM
Tiny
JOHNNY G.JR
  • MEMBER
Keep us posted here at 2carpros, one more thing is cooling fan cycling properly
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Friday, December 30th, 2016 AT 11:38 PM
Tiny
WAYNO123
  • MEMBER
Yes! I got heat. Tons of heat. Faulty thermostat I got at AutoZone. Picked up a new Stant thermostat today.I need this old van to haul my gear for ice fishing. Got bait.I'll be on lake tomorrow. Thanks for everything.
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Saturday, December 31st, 2016 AT 2:37 PM
Tiny
SATURNTECH9
  • EXPERT
Glad to hear it I always get the start thermostat when I buy them. Let me know how the fishing goes tomorrow.
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Saturday, December 31st, 2016 AT 5:50 PM

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