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Someone worked on my 1997 ford f150 heater core. after getting it back i noticed my a/c only blows hot air any clues?

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Sounds like someone knocked a vacuum hose loose. These hoses attach to vacuum motors which operate the doors which route the air through the ducting.

Posted on May 13, 2009

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2 Answers

Why wont my heat in my1997 ford f150 work


check coolant level and temperature of the heater hoses after the engine is at operating temp. the heater hoses should be the same temperature if not then the heater core is plugged and needs replacing. if the hoses feel the same temperature but not heat you may need to replace the thermostat. I am guessing the blower motor is functioning to blow air over the heater and into the cab.

Jan 13, 2015 | 1997 Ford F150 Regular Cab

1 Answer

1997 E350 Eldorado bus passenger heater blowing cold air


There is a separate heater core, like a small radiator, which needs hot water running through it, so when the air blows over it, the air gets hot. It sounds like the diverter valve which sends the hot water to this heater core is not working. It could be a problem with the valve itself, or the relay or switch that controls it, or the vacuum line or device that opens the valve when the switch or relay tells it to open.

Dec 10, 2013 | 1997 Ford Econoline

1 Answer

1994 f150 will not blow hot air from heater


check the level of coolant in system,check thermostat,check heater controls,make sure heater core isn't partialy blocked
hope you find it

Oct 21, 2011 | 1997 Ford F150 Regular Cab

1 Answer

My 2003 f150 has heating problem the blower works and thermosat works but still blows cold air


Could be a couple of things. First does the temp of the vehicle get hot, if not, probably the thermostat is stuck open and you would need to replace it. There is a possibility that the coolant level is low and thus created an air pocket in the cooling system and no hot water is flowing through the heater core. If that is the case you would need to top off the coolant system and bleed the air out of it. Another possibility is a clogged heater core itself. Good luck.

Apr 21, 2011 | 2003 Ford F150 Regular Cab

1 Answer

Ac blows hot air comp is running


Make sure that the tubing around the accumulator is getting cold.
If not, the refrigerant may not be charged up.
Otherwise, the vacuum motor for selecting cold air may be not working correctly causing heated air from the heater core to be routed to the interior of the car.

Do you hear the vacuum motors working when adjusting the heat to cold selector? or changing the thermostat temperature if so equipped?

Jul 03, 2010 | 2004 Ford F150

1 Answer

My 1997 ford f150 heater blows cold air in winter and hot air in


first check and see if it has a thermstat installed or stuck open, second, make sure that your heater has not been bypassed by connecting the two hoses together

Apr 12, 2009 | 1997 Ford F150 Regular Cab

1 Answer

1997 F150 heater problem


your problem is caused by the air temperature control blend door actuator motor being defective, the little motor moves the door that gives either hot air or cold air or a blend of the 2.

Feb 21, 2009 | 2004 Ford F150

1 Answer

The heat in my 1992 Jeep Wangler is not working.


The only reason it won't blow hot air is because the water is not getting to the heater core. Check to see if you have a heater control valve in one of the two lines to the heater core. If so check to be sure that is is opening and closing. If it won't open then you get no water flow in to the heater core.

Feb 04, 2009 | 1998 Ford F150 Regular Cab

1 Answer

No heat just warm air


I think you are on top of your problem,,you dont need any one elses advice.
Complete rebuild of the cooling and heating system,, simple.

Jan 19, 2009 | 2001 Oldsmobile Alero

3 Answers

My 1999 Ford F150 Heater only blows out cold air


guys have you checked for a vaccum leak????? there is a little plastic ball with a vaccum line going to it that controls the outside air coming in. check for a leak in this line

Dec 10, 2008 | 2001 Ford F150 Styleside SuperCrew

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