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Lever wont slide on heater control - 1985 Toyota Pickup

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Heater wont blow heat blower runs but acts like heater box wont let heat come out heater core seems ok

I am a mechanic and auto-motive electrical systems technician, just a side note, currently while answering this question i am preparing to go complete a task of rewiring the entire electrical system in a Ford Sierra.

On this note i will ask are you only hearing the blower running or can you feel air coming out of the vents? If yes you may have one of the following problems as described below.

Some heaters are electric meaning they have a heating element just as what is found in domestic heaters while some others use the coolant from the radiator which carries the heat from the engine which flows through the core. In either case the blower blows air across/ through the core which in turn carries the heat to the cabin. In the case of an electric heater system check and see if you got any blown fuses, because most of the time the fuse for the heater is separate from the blower also check for any faulty relays.

In the case that your vehicle has the heater system that is operated by the heated coolant from the engine, you may have a clogged heater hose or heater core. The hose or core may become clogged as a result of debris, rust etc from the engine, heater core or radiator. In that case a system flush is required. To check for a clogged heater core, there at two hoses on the core, one is the inlet and the other is the outlet. Have the hose that is the outlet disconnected, then check and see if coolant flows out of that hose with a steady flow ( make sure to put a container to collect the coolant so it does spill on the ground, make note of the color and also look for debris/particles.

In a case where which ever of the system you have the heater is functioning, the next thing that can be the problem is a stuck shut blend door. The blend door acts just like a door would to close of the passage of air flow to the cabin. For further assistance please add your vehicle make and model.

Jan 19, 2016 | Cars & Trucks

1 Answer

Heater control knob wont slide from hot to cool

if the lever wont move at all might b a rusted/bent cable sleeve, if it does move but doesn't change the temp then it might be as simple as the cable sleeve hold down clamp came undone

May 14, 2014 | 1986 Toyota Pickup 4WD

2 Answers

Heater control slide wont move to left

No problem Bro.I build these Toyota pickups for myself and have had 7 of them.I pull them apart and keep what I want.That lever is connected to a wire in a housing and goes to the water valve under hood above steering column.Sounds like the valve is loded with corrosion and stuck.Use a pair of channel lock pliers on the lever the cable is hooked to and free it up so the dash control lever moves freely and you're good to go.Move the valve lever gently till it frees.don't break it.And don't force the dash control,you'll straighten the wire cable end and lose the connection.Need to be pacient with your toy.Also,'84 t0 '91 are all the same.From sheet metal to under dash.I even replace carbureted with EFI using complete wiring harness and EFI from another year.Can't beat 20 to 27 MPG now.Carburated was 13 MPG max.

May 14, 2014 | 1985 Toyota Pickup

1 Answer

Why is 1986 toyota pick up temperature control slide on heater stuck in center and wont slide to the left to cool

Check the hard wire that moves the heater damper flap, it often gets bent and will get stuck in one position, hot or cold. Commonly sheathed in a blue plastic ~1/8" tube. Both ends can get bent if there is excessive gunk buildup at the ends or on the lever arms (rust, dirt, dried soda, etc.) They also just come loose after time and slide in the pinch clips that hold them in place. Be VERY careful if it is bent and requires straightening. The wire is strong enough for a few bends, but don't over-do it!

May 14, 2014 | 1986 Toyota Pickup 4WD

2 Answers

What exactly does the sliding heat lever on the dash control do and, in what manor?

It either controls a vent by a cable or controls a vacuum switch to move the vent control

Oct 27, 2013 | 1995 Ford Escort

2 Answers

Heater temperature slide lever not working

The motor for the blend door is broke.
The blend door controls the direction of air thru the heater core and the evaporator.

Sep 05, 2012 | 2000 Ford Windstar

1 Answer

Previous owner installed a tempurature contol are

Your heater door cable is maladjusted.I would start be removing the heater control and follow the cable to the door it controls. See which end is adjustable - it will have a small screw and a holder.

I would push the lever to full cold and then loosen the cable and let it slide until the lever maxes out in the cold spot on the controller and then tighten again. Test its operation a few times before reinstalling everything.

Jan 13, 2010 | 1994 Mercury Topaz

2 Answers

Defrost switch

len2664: check for a bent control cable or door which is binding due to corrosion. The binding can be taken care of with WD-40.

Apr 21, 2009 | Chevrolet Nova Cars & Trucks

1 Answer

Clicking sound

There is an actuator motor that controls the heater door, when these go bad they make a clicking noise. If the clicking stops or pauses when you change the heat from hot to cold the actuator needs to be replaced. There is no cable on the temp control it is electrical.

Dec 24, 2008 | 1999 Ford Windstar

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