Sharan (64.4.163.234) - Wed Sep 10 10:01:12 2008

My husband has a F250 diesel truck. The only vent that works is the one on the floor, and that is because he rigged it up to stay open. Also he has no heat. Since he will wait till last minute I thought I would try to find out what can be done or if anyone knew what the problem is

Thank You

Reply #1 Tom Vallillee (142.166.168.71) - Sat Dec 20 08:23:54 2008

I have a Ford 2007 4x4 lariat I am having a problem with the heater. I will drive downe the road with heater on, an for no reason cold air will start bloing instead of hot as the demand is. worst on cold days. dealer says could be hard to find problem. I dont want to be the guinypig. an ths will cost me $$

for them to learne. pleas help me. thanks Tom

Reply #2 sean (75.120.149.162) - Fri Jan 2 19:13:44 2009

Dear Sharan If you have a diesal you probaly have a bad vacume pump

Reply #3 jtoural (98.181.40.222) - Wed Jan 14 22:44:11 2009

if it is an 08 and coolant level is low it will not blow hot air do not know why this happens

Reply #4 German (96.235.102.41) - Mon Feb 9 16:34:35 2009

I have a f250 diesel and the problem was the mechanism to change coold or heat and ducts air is under the glove comparment where passenger foots at look up and pull the black cover and is a litle white box(4-5")turn your ac and check if the sprockets works is not go to junk yard and buy it for cheap

Reply #5 Craig (24.111.4.34) - Mon Mar 9 07:36:30 2009

I have a 2002 Ford F250. The only direction the air flows is thru the defrost. It doesn't make any difference where the control knob is set. I do have heat and a/c but it only comes out the defrost.

Reply #6 Shirley (68.219.32.16) - Tue Apr 28 20:35:39 2009

Where is the vacuum pump located on a 2006 F250 diesel?

Reply #7 scott (97.93.41.42) - Wed Jul 1 04:00:46 2009

craig and shirley. heater will default to defrost when there is no vacuum. Pump is in engine compartment on passenger side in front of heater motor.

Reply #8 elliott (24.167.43.90) - Thu Aug 13 14:26:00 2009

I have a 05 f-250 king ranch. same damn problem. only blow through defrost vent. I will e-mail ford and tell them quit making ty parts.

Reply #9 Rick (74.205.207.26) - Wed Sep 9 21:23:46 2009

I have a f250 with a 6.8L and under acceleration I loose vacuum.

I have sprayed the complete vacuum system and intake and found no leaks.

Reply #10 Mark (69.178.23.118) - Sun Nov 15 19:29:43 2009

I have 1993 f250 351, new heater core, flushed system, replaced stat 2 times, very low heat coming out of the vent, (good air flow)switchs from hot to cold, just will not produce heat

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