Question about Dodge Ram

Open Question

2002 1500 4.7l. Why is heater fan operation erratic?

When I start my truck with my fob the heater fan will work just fine low medium and high. As soon as the 10 minutes time out and I have to restart it with my key my heater fan will not blow. Why will it work when I started with the fob but it won’t work when I started with the key and engage to drive?

Posted by Mike Fleming on

Ad

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

2 Answers

How do I fix heater fan to operate at low and medium speeds. It only works on High.


depending on car some have a fan relay or its your switch itself

Jan 13, 2016 | Cars & Trucks

1 Answer

2010 Lincoln MKS Heated Seat on driver's side stopped working (Light in button turns off on its' own)


The most common cause of this problem is that the drivers seat heater grid is open or burned out. That is based on 25 years as a Ford dealer technician.

Feb 27, 2017 | Lincoln Cars & Trucks

2 Answers

Why does heat-air fan only work on high


Can you tell that the fan is getting higher or lower? Or is there no response from the fan control until you get to the high position?

Jun 24, 2014 | 2001 Chrysler Town & Country

1 Answer

Why does my heater in my 2000 ford ranger only work on the high setting?


I assume that you are talking about the heater fan?

Your heater FAN has at least 3 settings, and for our purposes we will assume low,med and high

Low and medium run through a resistor High is wired direct
Either your resistor is bad or your fan is
I know it seems wrong that the fan could be shot but it could be pulling so many amps that it won't work in any other mode than high
I just had this happen on one of my trucks
Start with the fan

Apr 06, 2010 | 1998 Ford Ranger SuperCab

1 Answer

Heater fan only works on "high speed"


All cars are designed with a blower fan motor that pushes air through the ventilation system. This air is processed by a series of vents to direct the air to various positions. Example: heater, air conditioner and defrost modes. Most blower motors are power by a basic electrical circuit that utilizes a multi resistor or a solid-state resistor to control different fan speed modes (low, medium low, medium and high). If the resistor malfunctions it may lose one or more of the lower fan speed settings.
google_protectAndRun("ads_core.google_render_ad", google_handleError, google_render_ad);

Mar 02, 2010 | 1999 Buick Century

1 Answer

2004 chevy heater fan works on low and medium speed but not on high speed


There are two relays for the heater control fan,a low blower relay and a high blower relay.It sounds like the hi blower relay is bad.

Dec 12, 2009 | 2001 GMC Jimmy

2 Answers

2005 G6


If the heater fan on your car only works on "High" the problem is more than likely the resister assembly in your blower circuit or poor connections at the resister assembly. When the switch is in the "high" position the current does not flow through the resister assembly it flows directly to the coil of the blower relay. When the switch is in "low", "medium 1", or "medium 2" position the current flows through 1, 2, or all 3 of the resistors in the resistor assembly which results in the 3 different lower speeds. Check the resister assembly and replace if needed. 

Nov 25, 2008 | 2006 Pontiac G6

2 Answers

Delayed or intermittent heat


after checking the heater core hoses they were both hot I went in to look at the blend door and noticed it wasn't moving on hot or cold so I simply disconnected the lincage and moved to hot and its working ok. but its not completely repaired

Oct 27, 2008 | 2003 Jeep Liberty

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

Related Topics:

15 people viewed this question

Ask a Question

Usually answered in minutes!

Top Dodge Experts

Marvin
Marvin

Level 3 Expert

85239 Answers

Thomas Perkins
Thomas Perkins

Level 3 Expert

14866 Answers

Mike

Level 3 Expert

4372 Answers

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

Answer questions

Manuals & User Guides

Loading...