Rapid Heat Not Working! - Resolved
Thread Starter
|
Super Moderator
Joined: Aug 2003
Posts: 25,479
Likes: 742
From: Isanti, MN
Rapid Heat Not Working! - Resolved
So when I got this truck I was insistent that I get the rapid heat option. After owning a 6.4L I'm all too familiar how long it can take a diesel engine to warm up. Having just moved to Wisconsin I wanted my HEAT!
Ever since it started getting cold I have been disappointed, it felt like it wasn't doing anything at all. Then I read Epic Cowlick's post about how warm it was in his 15° start thread, and decided to give it a test.
So Wednesday I plugged in my Scan Gauge and watched the voltage while turning the heater on and off. There was no change whatsoever, and an 1,850 watt load would certainly show as a voltage drop. So it's simply not working, and I'm frustrated about it!
Does anyone know of any common problem or fix?
I have an appointment at the dealer for it to go in and get fixed next Friday. It was -4° F this morning and I don't wanna wait that long!
Ever since it started getting cold I have been disappointed, it felt like it wasn't doing anything at all. Then I read Epic Cowlick's post about how warm it was in his 15° start thread, and decided to give it a test.
So Wednesday I plugged in my Scan Gauge and watched the voltage while turning the heater on and off. There was no change whatsoever, and an 1,850 watt load would certainly show as a voltage drop. So it's simply not working, and I'm frustrated about it!
Does anyone know of any common problem or fix?
I have an appointment at the dealer for it to go in and get fixed next Friday. It was -4° F this morning and I don't wanna wait that long!
Post Fiend
Joined: Apr 2004
Posts: 5,158
Likes: 35
From: North of Salt Lake City
Mr. Moderator the Honorable,
Are you setting the system to Auto before you shut off? I expect you have but I have to ask. Go outside and make sure the system is on auto and turn your temp up to 90 degrees. When you come outside in the morning, the differential will be great enough to trigger the rapid heat. Just start the truck and don't touch anything and you should notice right away warm air coming out at your feet. Just checking the basics because you didn't mention it. Please don't ban me...
lol
Are you setting the system to Auto before you shut off? I expect you have but I have to ask. Go outside and make sure the system is on auto and turn your temp up to 90 degrees. When you come outside in the morning, the differential will be great enough to trigger the rapid heat. Just start the truck and don't touch anything and you should notice right away warm air coming out at your feet. Just checking the basics because you didn't mention it. Please don't ban me...
lol
Thread Starter
|
Super Moderator
Joined: Aug 2003
Posts: 25,479
Likes: 742
From: Isanti, MN
Mr. Moderator the Honorable,
Are you setting the system to Auto before you shut off? I expect you have but I have to ask. Go outside and make sure the system is on auto and turn your temp up to 90 degrees. When you come outside in the morning, the differential will be great enough to trigger the rapid heat. Just start the truck and don't touch anything and you should notice right away warm air coming out at your feet. Just checking the basics because you didn't mention it. Please don't ban me...
lol
Are you setting the system to Auto before you shut off? I expect you have but I have to ask. Go outside and make sure the system is on auto and turn your temp up to 90 degrees. When you come outside in the morning, the differential will be great enough to trigger the rapid heat. Just start the truck and don't touch anything and you should notice right away warm air coming out at your feet. Just checking the basics because you didn't mention it. Please don't ban me...
lol
I have an XLT truck without the automatic climate control. I simply turn the temperature **** all the way up and crank up the fan and it's supposed to be working.
Not sure what I could be doing wrong, is there something I'm not aware of?
Post Fiend
Joined: Apr 2004
Posts: 5,158
Likes: 35
From: North of Salt Lake City
but seriously, don't ban me....
seriously...
I think we need PowerStrokeHD to chime in. I'm not sure how it works without auto climate control.
Thread Starter
|
Super Moderator
Joined: Aug 2003
Posts: 25,479
Likes: 742
From: Isanti, MN
The window sticker says it's supposed to be there, so I'm assuming all is there...
Trending Topics
Fleet Owner
Joined: Jan 2004
Posts: 26,007
Likes: 575
From: Brentwood,CA
Yes I did not do the repair but the invoice involved discharging the AC? The dealer told us that the entire plenum is different with the rapid heat option so it was a very involved repair and not to mention they must have left out half the bolts or got pissed during the process because the dash rattles on even a smooth road.
But with that truck off the road its not making any money and with 13 trucks down already in the last two months we have no extra trucks to spare so the rattles will have to stay for now. But hey so far these 6.7 trucks are doing good and with an extra 1-2 mpg over the 6.4 trucks we have it adds up. These trucks are seeing 9600 miles a month and are driving back and forth every day from a job site 200 miles away and are on heavy rotation and lots of drivers. The trucks will leave with the morning crew drive out there and the night crew drives them back home and the next crew drives out and the process starts over.
But with that truck off the road its not making any money and with 13 trucks down already in the last two months we have no extra trucks to spare so the rattles will have to stay for now. But hey so far these 6.7 trucks are doing good and with an extra 1-2 mpg over the 6.4 trucks we have it adds up. These trucks are seeing 9600 miles a month and are driving back and forth every day from a job site 200 miles away and are on heavy rotation and lots of drivers. The trucks will leave with the morning crew drive out there and the night crew drives them back home and the next crew drives out and the process starts over.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
Tuned
Joined: Aug 2007
Posts: 272
Likes: 0
You are in WI. If you bought your truck here it rapid heat is standard. Mine appears to be working just fine.
Posting Guru
Joined: Oct 2010
Posts: 1,777
Likes: 0
Honorable Moderator,
heater.
It sounds like to me that if you are using rapid heat they want you to (on a manual climate control system) to set the blower speeds to to mid to low. Are you running on high speed? (please don't ban me if you are ). Also, as for the voltage drop. I don't know if you will be able to see a voltage drop. The total amperage draw should be around 130 amps (@ 14.2VDC) but I suspect it has a duty cycle (i.e. on/off cycling).
From the Diesel supplement:
Rapid heat supplemental heating system (if equipped)
The optional rapid heat feature is an electrically powered device that is
designed to provide supplemental heat during engine warm up. For
maximum effectiveness mid to low blower speed is recommended during
initial warm up. When operating in automatic mode (when equipped) the
climate control unit will determine the appropriate blower speed for
existing conditions.
designed to provide supplemental heat during engine warm up. For
maximum effectiveness mid to low blower speed is recommended during
initial warm up. When operating in automatic mode (when equipped) the
climate control unit will determine the appropriate blower speed for
existing conditions.
Note:
Additional aftermarket electrical loads operated during engine
warm up may impact the performance of the rapid heat supplemental
warm up may impact the performance of the rapid heat supplemental
heater.
It sounds like to me that if you are using rapid heat they want you to (on a manual climate control system) to set the blower speeds to to mid to low. Are you running on high speed? (please don't ban me if you are
). Also, as for the voltage drop. I don't know if you will be able to see a voltage drop. The total amperage draw should be around 130 amps (@ 14.2VDC) but I suspect it has a duty cycle (i.e. on/off cycling).
Thread Starter
|
Super Moderator
Joined: Aug 2003
Posts: 25,479
Likes: 742
From: Isanti, MN
Honorable Moderator,
heater.
It sounds like to me that if you are using rapid heat they want you to (on a manual climate control system) to set the blower speeds to to mid to low. Are you running on high speed? (please don't ban me if you are ). Also, as for the voltage drop. I don't know if you will be able to see a voltage drop. The total amperage draw should be around 130 amps (@ 14.2VDC) but I suspect it has a duty cycle (i.e. on/off cycling).
From the Diesel supplement:
Rapid heat supplemental heating system (if equipped)
The optional rapid heat feature is an electrically powered device that is
designed to provide supplemental heat during engine warm up. For
maximum effectiveness mid to low blower speed is recommended during
initial warm up. When operating in automatic mode (when equipped) the
climate control unit will determine the appropriate blower speed for
existing conditions.
designed to provide supplemental heat during engine warm up. For
maximum effectiveness mid to low blower speed is recommended during
initial warm up. When operating in automatic mode (when equipped) the
climate control unit will determine the appropriate blower speed for
existing conditions.
Note:
Additional aftermarket electrical loads operated during engine
warm up may impact the performance of the rapid heat supplemental
warm up may impact the performance of the rapid heat supplemental
heater.
It sounds like to me that if you are using rapid heat they want you to (on a manual climate control system) to set the blower speeds to to mid to low. Are you running on high speed? (please don't ban me if you are
). Also, as for the voltage drop. I don't know if you will be able to see a voltage drop. The total amperage draw should be around 130 amps (@ 14.2VDC) but I suspect it has a duty cycle (i.e. on/off cycling).Most of the time it's been around the low to mid fan speed, as I do NOT like 5° air blasting at my face!
Playing with my scangauge, I can normally see a voltage drop when I turn electrical stuff on such as headlights, rear defroster, blower motor, etc. All of these combined use far less power than the rapid heat is supposed to. So I assumed that I would see some drop.
But I'm still not getting any heat! Until my EOTs start to get around 80-100 degrees I get virtually no heat out of the vents.
Mountain Pass
Joined: Dec 2009
Posts: 224
Likes: 7
From: Regina, Saskatchewan
If the fan speed is too high all you are doing is forcing cold air thru the system. On an auto system the fan runs only at low speed til the motor warms up
Posting Guru
Joined: Oct 2010
Posts: 1,777
Likes: 0
He's right. I think Epic talked about it once. It's like a hair dryer blower. At 1850W and coming through multiple vents, it just isn't going to be that warm. The higher the fan speed the more air there is to dilute the heat.