Testing Block Heater - Ford Powerstroke Diesel Forum
 
LinkBack Thread Tools Display Modes
post #1 of 8 Old 10-12-2009, 03:11 PM Thread Starter
Compression Ignition Addict
 
benderado's Avatar
 
Join Date: Jun 2007
Location: Casper, WY
Posts: 317
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Testing Block Heater

I know there are a ton of threads on cold start troubles and block heaters, but I can't seem to find one that matches whats happening with me.

Both my roommate and I drive diesels and we both plug 'em in when it gets cold. All of last winter we never had a single problem.

However, since it has gotten cold here, the breaker connected to the GFI outlet outside has been blowing.

This morning, my roommate did some "testing", by only plugging in my truck and sure enough, it tripped the breaker again. I use a 25' extension cord and my plug is in the opening of my bumper.

I've borrowed a multimeter from work and did some basic testing (due to my limited knowledge of household electricity). The extension cord is good, .2 ohms on both sides.

I also ran resistance on the block heater, it started at about 20 ohms and climbed to about 150 ohms. I have no idea if this is good or bad.

What else should I test? Could the block heater be bad? How hard are they to change?

HI.....I'm Kyle
RIP: 1996 F-250 X-Cab Long Bed
Now: 2006 Ram 2500 CC SB SLT 6 Speed
benderado is offline  
post #2 of 8 Old 10-12-2009, 04:05 PM Thread Starter
Compression Ignition Addict
 
benderado's Avatar
 
Join Date: Jun 2007
Location: Casper, WY
Posts: 317
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Someone has had to of tested their block heater before!!!

HI.....I'm Kyle
RIP: 1996 F-250 X-Cab Long Bed
Now: 2006 Ram 2500 CC SB SLT 6 Speed
benderado is offline  
post #3 of 8 Old 10-12-2009, 07:06 PM
Compression Ignition Addict
 
toads250's Avatar
 
Join Date: Nov 2007
Location: Klamath Falls,Ore.
Posts: 229
Thanks: 1
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Block heaters draw about 1000 watts, I had a problem when I plugged mine in, in the garage,when the air compresser would kick on the gfi would pop... no frezzer, air compr. and no block heater so ahd a electrcian friend wire a plugin 50amp fuse right from my main panel and now no problems.

96 f250 4x4 sb 5spd.psd
big air in and black smoke out
various diesel locomotives
toads250 is offline  
post #4 of 8 Old 10-13-2009, 02:28 AM
Compression Ignition Addict
 
cndrm's Avatar
 
Join Date: Aug 2009
Location: Albuquerque, Nm
Posts: 777
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
To me, it sounds like your block heater is working fine. The resistance creates heat, therefore heating your block/ coolant. It's not uncommon to have electronices of this type, increase their resistance as the heat goes up.

I think that it's odd that you had no problems last winter, but you do this winter. What gauge extension cord are you using? I personally wouldn't use anything smaller than a 12 gauge, and preferably using a 10 gauge, but that's me.

There could be quite a few things causing this problem. It's tough to say. Do you know what else is on the circuit that you're plugging your truck into? As Toads250 said, he also had an air compressor, freezer on the same circuit he was plugging his truck into. It could be something as minor as an appliance getting a little old, and drawing more current than before. Then you plug in your truck, and pop goes the breaker.

mike

Don't burn your bridges, you might have to cross them again in life.

Don't sugar coat things. It covers up the taste of real life.

Providentia Remedium Belli

Early 1995 F-350 Crew Cab Long Bed
33" Hankook RT03 Muders
DIY Intake w/ Napa 6637 filter
3" DP to 4" exhaust

Want:
Charge Air Cooler
Adrenaline HPOP
Fuel System
Custom Tunes
Upgraded gear reduction starter
Bypass Oil System
Bypass/ Coolant filter system
Gauges
Built Tranny
cndrm is offline  
post #5 of 8 Old 10-13-2009, 06:24 AM
Compression Ignition Addict
 
ridiculously_necessary's Avatar
 
Join Date: May 2008
Location: Blue Springs, MO
Posts: 4,207
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
anything new go to that breaker? liek anyhtign installed over the summer?

also, i hear breakers can get old and flip when they shouldnt. ive been told thats a good sign they need to be maintenanced. i also understand the breaker switch should be stiff and not soft when flipping.

-Matt

Late 99 (2/99) Black F250, CC LB 4x4 Lariat 214k. All Stock for the moment...

1995 PSD, ext cab, one wheel wonder , 297k miles, 30k on wvo. totaled 5/8/11 RIP This truck is for sale as a parts truck (Jason is about to receive forged rods, and drop kick his PMR's)
DB high torque starter
DIY 6637
Marinco Mod
DIY Electric fuel w/ wvo conversion

"A clean house is a sign of a mis-lead life."
ridiculously_necessary is offline  
post #6 of 8 Old 10-13-2009, 04:42 PM Thread Starter
Compression Ignition Addict
 
benderado's Avatar
 
Join Date: Jun 2007
Location: Casper, WY
Posts: 317
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Well, I had it plugged in all night last night with no breaker pop. So my only conclusion is that having both trucks plugged into the same outlet is drawing too much and poping it.

I believe it is a 40 amp breaker and is soley for the outlet outside.

When my roommate gets back we'll see if it pops again and if it does we'll go from there.

HI.....I'm Kyle
RIP: 1996 F-250 X-Cab Long Bed
Now: 2006 Ram 2500 CC SB SLT 6 Speed
benderado is offline  
post #7 of 8 Old 10-13-2009, 05:06 PM
Compression Ignition Addict
 
Join Date: Aug 2007
Location: Jackson's Hole, WY
Posts: 523
Thanks: 2
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
If the block heater is indeed a 1000 watt heater, then it draws approximately 9 amps at 110 volts. A 40 amp breaker should be ok for both trucks if both draw less than 20 amps.

One test you could do is to ohm between the plug and the frame on the truck. It may be possible to have a short develop if the cable wears on the body or frame. This problem may be intermittent, and probably would be a good idea to visually inspect the cable to check for wear.

99 F350 CCLB 67k miles.

Sold: 01 Dodge cummins ECLB a few more mods to 353hp

Sold: 97 F250 SCLB, 5 speed 2wd. minor mods to 327hp

See a pattern? next I will have to find one of those 6 door jobbers...
Big Bird is offline  
post #8 of 8 Old 10-14-2009, 02:20 AM
Compression Ignition Addict
 
cndrm's Avatar
 
Join Date: Aug 2009
Location: Albuquerque, Nm
Posts: 777
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
^^ good post.

mike

Don't burn your bridges, you might have to cross them again in life.

Don't sugar coat things. It covers up the taste of real life.

Providentia Remedium Belli

Early 1995 F-350 Crew Cab Long Bed
33" Hankook RT03 Muders
DIY Intake w/ Napa 6637 filter
3" DP to 4" exhaust

Want:
Charge Air Cooler
Adrenaline HPOP
Fuel System
Custom Tunes
Upgraded gear reduction starter
Bypass Oil System
Bypass/ Coolant filter system
Gauges
Built Tranny
cndrm is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome