Heater servo valve

[Ployboy]

I don’t think my servo valve is completely closing the flow of coolant to the heater. Where do I look for it? Or where would be the best place to install a manual cut-off? Any suggestions or experience with this on the Stallion would be greatly appreciated.

2008 Stallion

[tomg]

I don’t think my servo valve is completely closing the flow of coolant to the heater. Where do I look for it? Or where would be the best place to install a manual cut-off? Any suggestions or experience with this on the Stallion would be greatly appreciated.

2008 Stallion

Haven't got a clue on this one ! I recommend you call Richard at TMS on Monday morning. Remember they are on central time. tomg

[Gorilla]

Not sure but I would look first in the rear behind the rear seat back. I believe the heat exchanger is in that area.

[Ployboy]

Thanks, guys for the replies. I’ll look behind the seat. I thought possibly it was back there. I was hoping it wasn’t behind the dash area somewhere (too congested).

John

2008 Stallion

[Jack Klarich]

This is a typical Ford heater control valve

It will be in 1 of your heater hoses before the heater core

Most often the valve will either leak or stick

[trikervet]

It is probably a good idea to cycle it through during the warmer months so that it doesn't freeze up.

[Jack Klarich]

I dunno what your heater/ AC box looks like

If it is based on a Ford design, they were notorious for having blend door problems

[Ployboy]

I haven’t looked at it yet. But I know it was made by Vintage Air.

[FuzzyWuzHe]

I am truly getting old ... LOL.

I never thought I'd be reading a thread on a Trike bulletin board about AC and Heater problems. Technology is a wonderful thing.

I did actually purchase heated riding gear a couple of years ago ... gotta admit, I'm at that age where I like the comfy feeling ...

[trike tech]

This is a typical Ford heater control valve

It will be in 1 of your heater hoses before the heater core

Most often the valve will either leak or stick

Pretty close. The heater valve on the stallion is more of what I call a butterfly style (doesn't have the actuator like the one shown). It's located on the top of the hvac box under the right rear wheel, can also see it by removing the passenger seat back. It'll have a plastic cover over it that snaps on & off & like others have said the heater hose can be your guide to it.

I'd also make sure the heater control knob & control on the dash isn't your issue. The knob should turn almost a full 360 but stop just short of; if the knob will spin all the way around & keep spinning the set screw is backed off & the knob isn't actually turning anything. You'll need to remove the cover plate to access the small allen set screw that secures the knob to the control.

[Ployboy]

Pretty close. The heater valve on the stallion is more of what I call a butterfly style (doesn't have the actuator like the one shown). It's located on the top of the hvac box under the right rear wheel, can also see it by removing the passenger seat back. It'll have a plastic cover over it that snaps on & off & like others have said the heater hose can be your guide to it.

I'd also make sure the heater control knob & control on the dash isn't your issue. The knob should turn almost a full 360 but stop just short of; if the knob will spin all the way around & keep spinning the set screw is backed off & the knob isn't actually turning anything. You'll need to remove the cover plate to access the small allen set screw that secures the knob to the control.

Trike tech, I think my control knob is working correctly as you described. I’ll look for the controll valve as soon as I get a chance. Thanks for the description on its location.

John in Olney, TX