Question about 1997 Chevrolet C1500

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No heat out of vents

New radiator,T/stat and new heater core

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Check heater control valve, may not be opening to let coolant circulate.

Posted on Jan 21, 2009

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I get very low heat i have flushed system completely new radiator, thermostat, radiator cap, still no heat whats left?


Check to make sure vents are not clogged,below window by wipers check that and vents from dash going down,If not plugged then probably your heater core or heater blower motor may be shot or weak,you need a Haynes manual to check these if you are not familiar with where these are located at.Haynes manuals can be bought at most auto parts stores

Oct 31, 2014 | 2004 Jeep Liberty

1 Answer

ACCESS BLEND DOOR


blend door is inside the heat/ac box that contains the heater core that you changed. It is vacuum operated, so check all of your vacuum lines. There is a vacuum line that goes thru the firewall, right above or below the 2 heater hoses.

Jan 01, 2014 | 1999 Dodge Durango

1 Answer

I have 2000 astro van and I'm not getting heat, I changed thermo stat and flushed heater core. Still no heat, whats the next step?


Feel your heater hoses. If both are hot, the core is circulating. If only one is hot-poor or no circulation of the core.
If the heater core is circulating, the temperature blend door may not be working to let blower air pass across the heater core, and into the vents. If vacuum operated, watch the vacuum valves as you move heater controls-you may spot the problem. Check that the vacuum line from the engine to the control switch is working and still connected. If not operated by vacuum, the controls may have cables to the heater case or may be electrically operated. You'll just have to scope it out. Good luck.

Nov 24, 2012 | Chevrolet Astro Cars & Trucks

1 Answer

95 jeep cherokee heat


Both of the hoses at the heater core should be hot. If one is cold the heater core is plugged. You can think of it this way. If the thermostat was stuck closed and you checked the upper and lower radiator hoses with the engine hot the upper hose would be hot and the lower hose would be cool because there is no flow. If you check the hoses with a properly working t-stat both hoses will be hot when the t-stat is open and coolant is flowing. Let me know if you have any questions and I'll do my best to answer them. Thank you for using FixYa.com!

Jan 21, 2012 | Jeep Cherokee Cars & Trucks

1 Answer

1999 ford taurus no heat blowing out of vents cool air blows out has a new t-stat ,antifreeze is fine,


Hi Ron,

Blend air door actuators fail often in Ford Taurus. It sounds like that may be the problem with yours. For more information regarding this subject, please read the following article:

Why Is My Hater Cold?

Dec 27, 2011 | 1999 Ford Taurus

1 Answer

02 maxima blows no heat. Only one hose going to core is warm. Have new t-stat and new radiator. I'm having trouble locating blend door. Still don't know if that's the problem.


If only one hose going to the core is hot, then the heater core valve is bad. It's what stops or allows hot coolant into the core. Only one hose being hot means coolant is not traveling through the heater core. Have that valve checked out.

Jan 12, 2011 | 2002 Nissan Maxima

1 Answer

Heater not working (no heat)


If u have issues with heatting may be this will help.

1- If the carpet under the heater core is damp, or if antifreeze vapor or steam is coming through the vents, the heater core is leaking.Remove it and install a new unit (most radiator shops will not repair a leaking heater core.

1 - If the air coming out of the heater vents isn't hot, the problem could stem from any of the following causes:
  • The thermostat is stuck open, previnting the engine coolant from warming enough to carry heat to the heater core. Replace the thermostat.
  • There is a blockage in the system, Preventing the flow of coolant through heater core. Feel both heater hoses the firewall. They should be hot.if one of them is cold, there is an obstruction in one of the hoses or in the heater core,or the heater control valve is shut. Detach the hoses and back flush the heater core with a water hose. If the heater core is clear but circulation is impeded, remove the two hoses and flush them out with a water hose.
  • If flushing fails to remove the blockage from the heater core, the coremust replaced.

Nov 19, 2009 | 2003 Ford F250 Super Duty Crew Cab

1 Answer

I have a 2002 dodge ram 1500 pickup w. hwat issues


is this a problem w/ the interior vents? maybe stuck venting in outside air rather than from the heater box? did the heat only stop working after the radiator/hose install? if so, then you probably have a big air pocket stuck in the heater core.

Sep 30, 2009 | 2002 Dodge Ram Maxi

1 Answer

'95 sierra 2500. not heating up. replaced thermostat .


check and see if the heater valve is opening. it should be on one of the heater hoses. If it is open make sure that all the air is out of the engine. check and see if both sides of the radiator are the same temp. They should both be the same. If it was working before you changed the stat, then it could be a bad stat

Feb 28, 2009 | 1995 GMC Sierra C1500

1 Answer

No heat comming out of fan


These are well known for clogged Heater Cores. I would have the heater core flushed if possible.

Sep 13, 2008 | 2000 GMC Jimmy

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