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

116,535

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

1 of 1 people found this helpful.
116,535

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 of 2 people found this helpful.
116,535

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 of 2 people found this helpful.
10,965

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

F-250 Super Duty

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

CarGurus has 49,460 nationwide F-250 Super Duty listings starting at $1,899.

ZIP:

Ford F-250 Super Duty Experts

  • #1
    Tracy Hooks
    Reputation
    910
  • #2
    Tom Demyan
    Reputation
    700
  • #3
    kbro
    Reputation
    670
View All

Related Models For Sale

Used Ford F-350 Super Duty
373 Great Deals out of 27,290 listings starting at $3,000
Used Ford F-150
3,267 Great Deals out of 223,477 listings starting at $1,200
Used Chevrolet Silverado 2500HD
375 Great Deals out of 30,778 listings starting at $2,500
Used Dodge Ram 2500
156 Great Deals out of 5,493 listings starting at $2,661
Used GMC Sierra 2500HD
109 Great Deals out of 14,334 listings starting at $2,799
Used Chevrolet Silverado 1500
2,717 Great Deals out of 175,181 listings starting at $955
Used Ford F-450 Super Duty
43 Great Deals out of 2,794 listings starting at $4,995
Used GMC Sierra 1500
1,180 Great Deals out of 64,912 listings starting at $999
Used Toyota Tundra
701 Great Deals out of 34,411 listings starting at $1,500
Used Dodge Ram 3500
87 Great Deals out of 2,306 listings starting at $5,999
Used Dodge Ram 1500
410 Great Deals out of 11,150 listings starting at $1,495
Used Toyota Tacoma
714 Great Deals out of 45,875 listings starting at $2,500

Used Cars For Sale

2017 Ford F-250 Super Duty For Sale
20 Great Deals out of 27,593 listings starting at $24,368
2016 Ford F-250 Super Duty For Sale
42 Great Deals out of 2,250 listings starting at $18,700
2015 Ford F-250 Super Duty For Sale
18 Great Deals out of 2,426 listings starting at $11,958
2014 Ford F-250 Super Duty For Sale
5 Great Deals out of 1,021 listings starting at $9,958
2013 Ford F-250 Super Duty For Sale
34 Great Deals out of 1,002 listings starting at $8,997

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.