Would a bad thermostat cause heater to not get warm? It only warms up when truck is moving. If I let truck sit and warm up it only blows cold air.

Asked by Jan 24, 2014 at 10:39 AM about the 2006 Ford F-250 Super Duty Lariat Crew Cab 4WD SB

Question type: Maintenance & Repair

4 Answers

101,375

If it's stuck open maybe. But most likely you have a blend door motor/actuator issue.

1 out of 1 people think this is helpful.
101,375

www.youtube.com/watch?v=aA-OADF-_q8 -- check this out. It's for a 2008 but I think you are having a similar issue.

2 out of 2 people think this is helpful.
101,375

Opps I didn't fully read your question. With it warming up while driving it could be a faulty thermostat causing it. After it has sit idling for a while feel the hoses going to the heater core. Are both of them hot? Is only one hot? Is neither hot? This will help diagnose your issue.

2 out of 2 people think this is helpful.
9,055

OH didn't say it was a diesel in your question. Seen it in your other question Diesel's are horrible at making or maintaining engine heat at or near idle due to there effiicency. Options are a high idle setup. Winter front is a must should warm up a little faster once you start moving. Do you have a electric block heater, plug that in until you start driving. If you really need heat I've used diesel/electric heaters to pre-heat the coolant and to keep heating it when the engine cannot. They are not cheap but they are handy. Webasto, Pro-heat and Espar are the main brands. I ran the Espar in my stuff. They consist of a small water pump and a diesel (or gas) burner. The unit uses diesel from the trucks tank to fire the heater. The unit circulates your coolant (usually you tie into the cab heater hoses) from your engine through your heater core and back to the engine and will burn on high until about 60 deg C and then maintain the heat in low burn mode. With the dual batteries in your truck the Espar could run for 3+ days at .25 of a gallon of fuel an hour. The cool thing is that that also have timers so that you can preset when the unit is to start-up and how long it runs for.

Your Answer

Add photo

Related Questions

  • How does the factory installed block heater work? 5 answers

    I have a new 2013 F250 6.0 and ordered the block heater from the factory. I plugged the cord in but the truck is still ice cold in the morning.

    2013 Ford F-250 Super Duty King Ranch Crew Cab 4WD

    -

    Maintenance & Repair

  • F250 7.3L start up problems & burning tons of oil? 1 answer

    My 7.3 recently had some work done on it. I replaced my O rings on the fuel bowl cause there was a leak. Then had to bleed the injectors cause they had air in them. It's been pretty cold out, so ...

    2002 Ford F-250 Super Duty XLT 4WD Extended Cab LB

    -

    Maintenance & Repair

  • 7.3 diesel stalls 7 answers

    When it's cold, my 7.3 diesel starts up and during warm up it goes into fast idle. When the fast idle disengages, the engine stalls. I'll be driving along and it'll stall even at 40mph as if I turned ...

    Ford F-250 Super Duty

    -

    Maintenance & Repair

  • I have a ford f250 SD 4x4. When I accelerate I get a vibration under the truck but as I reach the higher gears it stops...any idea's on what causes this? 3 answers

    I have a ford f250 SD 4x4. When I accelerate I get a vibration under the truck but as I reach the higher gears it stops...any idea's on what causes this? Also how do I engage and disengage the manual ...

    2003 Ford F-250 Super Duty

    -

    Maintenance & Repair

  • Heater blows cold air when stopped or ideling 1 answer

    I own a 2010 Ford Taurus SHO and am having problems with the heater. When the car is sitting still, it blows cold air but as long as you are traveling it blows warm. If you stop at a red light or stop...

    2010 Ford Taurus SHO AWD

    -

    Maintenance & Repair

F-250 Super Duty

Looking for a Used F-250 Super Duty in your area?

CarGurus has 42,569 nationwide F-250 Super Duty listings starting at $2,995.

ZIP:

Search Ford F-250 Super Duty Questions

Ford F-250 Super Duty Experts

#1 FordNut
FordNut
Reputation 640
#1 Tracy Hooks
Tracy Hooks
Reputation 640
#3 kbro
kbro
Reputation 550
View All

Related Models For Sale

Used Ford F-350 Super Duty
457 Great Deals out of 26,740 listings starting at $3,900
Used Ford F-150
3,389 Great Deals out of 203,566 listings starting at $1,273
Used Chevrolet Silverado 2500HD
437 Great Deals out of 29,275 listings starting at $2,998
Used Dodge Ram 2500
176 Great Deals out of 5,586 listings starting at $2,900
Used GMC Sierra 2500HD
123 Great Deals out of 13,837 listings starting at $1,500
Used Chevrolet Silverado 1500
2,629 Great Deals out of 148,535 listings starting at $1,800
Used Ford F-450 Super Duty
44 Great Deals out of 2,658 listings starting at $7,000
Used Toyota Tundra
670 Great Deals out of 28,112 listings starting at $1,599
Used GMC Sierra 1500
1,156 Great Deals out of 57,801 listings starting at $995
Used Dodge Ram 1500
568 Great Deals out of 12,973 listings starting at $1,200
Used Dodge Ram 3500
87 Great Deals out of 2,419 listings starting at $5,000
Used Toyota Tacoma
773 Great Deals out of 33,032 listings starting at $1,900

Used Cars For Sale

2017 Ford F-250 Super Duty For Sale
15,264 listings starting at $25,517
2016 Ford F-250 Super Duty For Sale
44 Great Deals out of 11,684 listings starting at $23,944
2015 Ford F-250 Super Duty For Sale
34 Great Deals out of 2,539 listings starting at $16,995
2014 Ford F-250 Super Duty For Sale
18 Great Deals out of 973 listings starting at $15,900
2013 Ford F-250 Super Duty For Sale
38 Great Deals out of 967 listings starting at $7,995