Question about Chevrolet K2500

1 Answer

My 1990 Chev K2500 truck heater only blows cold air. The heater core was replaced 2 years ago. The heater hoses are hot. The cab stays cold during cold weather. I am thinking the blend door is not changing positions and is wie open. I have no idea where the blend door motor even is. Could you please help me idenify the heater parts and what the problem could be? Thanks,Randy randyhiatt@msn.com

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 385 Answers

There is usually a heater control valve that lets hot water into the core. usually located out on the firewall in the supply hose

Posted on Sep 10, 2010

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Change heater core water pump one pipe get hot


try some comma's?
my wild guess, is you are trying to fix a dead cab heater, right?
and if so, can be caused by 5 things wrong. total.
1 engine coolant not hot (180F or more)
2; fan dead.(cab heater fan)
3:or core , coolant path blocked. (seems you)
4; core exterior core blocked with leaves or pin needles. (sucked in)
5: optional core valve , stuck closed. (cable bad, etc)\



one pipe hot , means ,? core pipe 1 is hot, and other is dead cold?
this flow blockage , bingo !

if pipe 1 is 180F and other is 120f this is normal the heater is heating air in the cab and is dropping due to this heat exchange. (normal)
so why not do the 2 year full flush service now. (skipped i bet)
core hoses:
remove the 2 hoses on engine side, never core side (easy damage)
then back flush both hoses. with a garden hose.
if there is a valve there, test it and make sure it's opening... and free flowing.
and that both engine water ports are open too, from heater hose
to engine. (yes, they pack up too)

Dec 07, 2013 | 1998 Toyota Camry

1 Answer

J30 not blending hot air into cold. Blows only cold. heater core is hot


What kind of setting do you have? is it turn knob, push button or something else?

Feb 06, 2013 | 1997 Infiniti.5 J30

2 Answers

I have a 1999 sierra 1500 4 w drive truck and my heat core blows only gold air. can anybody tell me what is the problem?


Before assuming the heater core is blown check the following.

1. Check coolant level while engine is cold.
2. Leave the radiator cap off and let the engine run. See if you can see the coolant circulate
when the engine is brought up to temperature.
3. Check the temperature gauge inside and note if the engine temp is correct.
4 Does the engine overheat?
5. Feel the heater hoses and check if they get hot.
6. Can you smell antifreeze inside the cab?

Start here and let me know.

Oct 31, 2011 | 1999 GMC Sierra

1 Answer

Why wont the heater blow hot air, the core doesnt look clogged?


Hi


Thanks for using FixYa. Try and check if the heater core is plugged. Find the 2 coolant lines going to the heater core. They are right next to each other with approx 3/4" hoses going to the engine. Now, warm up the engine with the heater on max (don’t turn on the fan). Next, feel if the hoses are warm (maybe HOT!) If they are not warm, then you most likely have a plugged core. A back flush will resolve the issue. If your hoses are warm, turn on the fan. One hose should go cold (or cooler than the other, actually should be about the same temp as the air from your air vents, if there is a plug). If both hoses are hot and stay hot, and you have no heat, then the problem is not with the heater core but with the blend doors.


There are electric motors that operate the "blend doors" inside the dash directing air flow from the heater core and A/C evaporator core to the cab of the vehicle. If you feel a drastic difference in one of the radiator hoses, then try replacing the thermostat and see what happens. If all the heater and radiator hoses are pretty much the same temperature I would suspect a control problem in the dash controls or in the blend door operation. You’ll need to remove the dash to check these.


Please do accept the solution if the issue is resolved or else revert for further assistance.


Thanks

Rylee

Dec 27, 2009 | 1991 Mazda MPV

1 Answer

Heater stoped workin and blows cold air, how do ya fix it


Hi


The a/c and heating systems on cars today are pretty complex. 10 years ago replacing the thermostat usually did the trick, but today there are electric motors that operate the "blend doors" inside the dash…directing air flow from the heater core and A/C evaporator core to the cab of the vehicle. Always start by checking the actual coolant level inside the radiator itself to make sure it is full.

Then feel the upper and lower radiator hoses to see if they are hot (when the engine has been running awhile and has reached normal operating temperature), then feel the two heater hoses leading into the cab of the vehicle to see if they are both hot as well.

If you feel a drastic difference in one of the radiator hoses, I would try replacing the thermostat and see what happens. If all the heater and radiator hoses are pretty much the same temperature I would suspect there to be a control problem in the dash controls or in the blend door operation and a visit to you dealer or a qualified mechanic is my recommendation.



Thanks

Rylee



Dec 21, 2009 | 1995 Chevrolet S-10 CA Edition

2 Answers

4.6 liter has one heater hose warmer than the other. may be plugged core,or is ther a fuse to climate control switch?


Look for a heater valve on one of the hoses if there is no valve i would say its a plugged heater core.

Dec 11, 2009 | 1999 Ford F150 Regular Cab

1 Answer

HEATER


Check the coolant level.Feel the heater hoses going to the heater core to see if they are warm,or hot.If one of them is warm,or hot,and the other is not,remove the heater hoses,and flush the heater core out with a water hose.Bleed the coolant system,and you might want to install a new thermostat while you are at it.

Dec 10, 2009 | 2002 Ford Taurus

1 Answer

Heater core problem and replacement instructions


You can disconnect both hoses and blow compressed air through the one that stays cold, this should free it up then recommend a coolant flush.

Oct 30, 2009 | 1999 Daewoo Nubira

1 Answer

The heat in my 1992 Jeep Wangler is not working.


The only reason it won't blow hot air is because the water is not getting to the heater core. Check to see if you have a heater control valve in one of the two lines to the heater core. If so check to be sure that is is opening and closing. If it won't open then you get no water flow in to the heater core.

Feb 04, 2009 | 1998 Ford F150 Regular Cab

1 Answer

Heater doesn,t blow hot


Have you checked your coolant? if coolant is low it can cause an air pocket in heater core and it wont pass out until rpm's increase by the extra flow of water pump. if it is full then might wanna try removing heater hoses and back flushing heater core with water might have a little trash in it restricting flow.

Dec 04, 2008 | 2004 Chevrolet Silverado 1500 Crew Cab

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

233 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

76109 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8269 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...