Heater not working??? - TheDieselGarage.com

Home Forum Who's Online Today's Posts Vendors Advertise
Go Back   TheDieselGarage.com > Dodge Diesel & Truck Discussion > 5.9L Cummins (1998.5-2002)

Thread Details Posted by JUMPSTER93, this thread has received 6 replies and been viewed 1813 times.

TheDieselGarage.com is the premier Forum on the internet. Registered Users do not see the above ads.
Thread Tools Display Modes
Old 12-07-2010, 01:08 AM   #1
Junior Member
Join Date: Aug 2009
Posts: 28
Points: 1,529
Thanks: 0
Thanked 0 Times in 0 Posts
Heater not working???

Just bought a 2000 Ram 3500 about 6 months ago and the heater has never worked. Anybody have any suggestions on where to start looking for a problem? Thanks
JUMPSTER93 is offline   Reply With Quote
Sponsored Links
Old 12-07-2010, 02:37 AM   #2
neeltburn's Avatar
Join Date: Dec 2008
Location: Evansville, IN
Posts: 4,813
Points: 40,891
Thanks: 302
Thanked 690 Times in 598 Posts
Flush the cooling system. Sounds like your heater core is done, but try flushing the cooling system and see what happens. The truck does run in the operation range for coolant temp?
"Only accurate rifles are interesting" -Townsend Whelen

2012 Ram 2500 Crew Cab Big Horn
6.7L 68RFE 4wd
Yeah its stock.
Edge Insight CTS / Line-X / Access Bed Cover
B&W Turnover Ball / Companion Hitch
Pac Brake Air Bags
On Board Air

2010 John Deere 2305
2010 Jeep Wrangler JK Unlimited Rubicon/ Tuned with some toys.
2015 Keystone Impact 311 Toyhauler

9-11-2001 NEVER FORGET
neeltburn is offline   Reply With Quote
Old 12-07-2010, 10:43 AM   #3
Singles Club #2
smokndiesel7588's Avatar
Join Date: Dec 2008
Location: Lebanon, PA/Flint, MI
Posts: 496
Points: 29,810
Thanks: 40
Thanked 30 Times in 30 Posts

Send a message via AIM to smokndiesel7588
You might also want to try just flushing the heater core. We did a full system flush on my buds truck once, and it improved the heating performance. Once we just disconnected the heater core hoses and flushed that only, it reached its full potential once again.
My Truck- '02 Dodge Ram 2500 QCLB...ISSPRO Gauges...110hp DDP Injectors...Smarty..TST Comp..Pro52 turbo..BHAF...4" Turbo back to single 8" mitre...converted to NV5600 with SB Street DD

Bro's Trucks- 97 Dodge Ram 2500 5spd 12V...DDP 90hp Injectors...Half-Cut DV's..0 Plate...starwheel turned..kdp & 5th gear fix...17.5deg timing...SB Feramic 13" clutch

96 Dodge Ram 2500 12V XCLB...auto...2wd...SOLD
smokndiesel7588 is offline   Reply With Quote
Old 12-16-2010, 06:49 PM   #4
Junior Member
Join Date: Jan 2006
Posts: 11
Points: 335
Thanks: 0
Thanked 1 Time in 1 Post
Before you do anything, with the engine at full temp, touch both heater core hoses coming from the firewall. If the heater core is fine then they both will be hot. If only ones hot then the core is plugged. If they're both hot but you're still not getting heat then check the blend door for the heater under the dash. With the key in the ON position (truck not running), when you change the heater temp knob from warm to cool, listen down by the passenger floor and you should lightly hear the blend doors electric motor running as it swings the door one way or another.
'01 Dodge Ram 2500 4x4 5spd Sport, EZ, Straight piped, aFe intake, Rancho 9000x's, 285's, Pac Brake, 2 lo kit, Dakota FP and Isspro boost/EGT gauges on the pillar, Raptor with 1/2" big line kit.
KATOOM is offline   Reply With Quote
Old 02-04-2011, 10:54 PM   #5
Junior Member
Join Date: Dec 2008
Location: Canada
Posts: 2
Points: 19,017
Thanks: 0
Thanked 0 Times in 0 Posts
also chek your thermostad
paulo100 is offline   Reply With Quote
Old 02-24-2011, 03:16 AM   #6
Junior Member
Join Date: Aug 2009
Posts: 28
Points: 1,529
Thanks: 0
Thanked 0 Times in 0 Posts
Replaced the heater core and it is working fine now. Thanks for the help.
JUMPSTER93 is offline   Reply With Quote
Old 02-25-2011, 05:59 PM   #7
Junior Member
Join Date: Nov 2009
Posts: 3,533
Points: 52,904
Thanks: 69
Thanked 651 Times in 574 Posts
If you did not flush the cooling system multiple times so it is clean the new heater core will collect the crud in the system.
1988 ford van fresh overhaul, 1991 nissan pick-up 1993 Caprice 2000 GMC S10 Blaser 2007 nbs 3500 GMC 4x4 crew-cab long box 17 inch single wheels Duramax Alison. BW turnover Ball. Furakawa FL35 loader. Retired, HD mechanic, worked on engines all my life. Fabricator welder. electrician. in the process of finishing my new shop. Live in Rock Creek B.C. Wife has a fruit stand.
Johnp3 is offline   Reply With Quote
Sponsored Links

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Radiator Leaks & heater not working trac 2008-2010 6.4L Power Stroke 1 01-13-2008 05:08 PM
block heater not working? daturbosix 2003-2007 6.0L Power Stroke 20 12-08-2007 12:31 PM
Heater Grid not working..... maninblack2k 5.9L Cummins (Pre 1994) 3 11-23-2007 04:18 PM
how to tell if the block heater is working littlebigrig6.0 2003-2007 6.0L Power Stroke 6 11-12-2007 09:00 PM

New To Site? Need Help? TDG Specials

All times are GMT. The time now is 11:35 AM.

Powered by vBulletin®
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
DTO Garage vBulletin Plugins by Drive Thru Online, Inc.
vBCredits v1.4 Copyright ©2007 - 2008, PixelFX Studios