heater valve

[TNHarley]

I had to replace my heater valve this weekend. It is that piece that connects 2 hoses for the cooling system between the motor and the firewall.. I got it on with no problem. However, my heater isn't working. It blows just fine, but it is cold as hell.
There is a small piece under it that connects to a wire running into the firewall. I wonder if I did something wrong with that?
Perhaps it is a completely different issue?

 

[TNHarley]

95 4runner

 

[DarkFury]

Is it possible that the heater core is so plugged up it only allows enough water to pass to cool the engine?

 

[TNHarley]

Is it possible that the heater core is so plugged up it only allows enough water to pass to cool the engine?

When my nozzle fatigued off, I bypassed the heater valve. I had a nozzle and put the 2 hoses together on that. I had to run my heater 24/7 but it worked. I even had to roll my windows down lol.
Basically, it worked until I put the valve on.

 

[strollingbones]

thermostat? perhaps? you need to get that working...snowing here....we are suppose to have brutal cold in the next few days..day care is delayed....so i got the bestest baby tomorrow....

 

[DarkFury]

Is it possible that the heater core is so plugged up it only allows enough water to pass to cool the engine?

When my nozzle fatigued off, I bypassed the heater valve. I had a nozzle and put the 2 hoses together on that. I had to run my heater 24/7 but it worked. I even had to roll my windows down lol.
Basically, it worked until I put the valve on.

Okay, then the valve is not working. Is it mechanical or electrical?

 

[TNHarley]

it is reading correctly, so I doubt that.

 

[TNHarley]

Is it possible that the heater core is so plugged up it only allows enough water to pass to cool the engine?

When my nozzle fatigued off, I bypassed the heater valve. I had a nozzle and put the 2 hoses together on that. I had to run my heater 24/7 but it worked. I even had to roll my windows down lol.
Basically, it worked until I put the valve on.

Okay, then the valve is not working. Is it mechanical or electrical?

mechanical. There is this plastic piece I had to screw to the bottom. It connected to a wire going into the firewall. I wonder if that is defunct? Maybe I should call the guy I ordered the part from..
I honestly didn't even consider the part not working..

 

[TNHarley]

 

[DarkFury]

it is reading correctly, so I doubt that.

Who said the read is right? WITHOUT the valve you have flow and heat. With the valve you have no heat right? That makes it the valve. I have bought thermostats new in the box that were stuck.

 

[DarkFury]

The wire is most likely the trigger. The valve must have a sensor.
So either the wire is screwed OR your computer is mis-reading the sensor.

 

[TNHarley]

The wire is most likely the trigger. The valve must have a sensor.
So either the wire is screwed OR your computer is mis-reading the sensor.

Good deal. What do you think I should do first?
And it isn't the thermostat. I checked the temp when I got to work.

 

[DarkFury]

The wire is most likely the trigger. The valve must have a sensor.
So either the wire is screwed OR your computer is mis-reading the sensor.

Good deal. What do you think I should do first?
And it isn't the thermostat. I checked the temp when I got to work.

Check the impedance on the wire like you would an electronic fuel injector. The wire may not be sending signal.

 

[TNHarley]

The wire is most likely the trigger. The valve must have a sensor.
So either the wire is screwed OR your computer is mis-reading the sensor.

Good deal. What do you think I should do first?
And it isn't the thermostat. I checked the temp when I got to work.

Check the impedance on the wire like you would an electronic fuel injector. The wire may not be sending signal.

Will do. Will update later. Thanks man!

 

[Jarlaxle]

Might you have reversed the flow? If so, that might do it.

 

[TNHarley]

I just realized my knob that goes from cold to hot on my dash is stuck on hot. I wonder if I did something to it? That's assuming that's where that line on my valve goes to?

 

[TNHarley]

Might you have reversed the flow? If so, that might do it.

It only went on one way

 

[DarkFury]

I just realized my knob that goes from cold to hot on my dash is stuck on hot. I wonder if I did something to it? That's assuming that's where that line on my valve goes to?

Could be a cable bind. Unhook both ends and see if you can twist it. That may break it loose.

 

[Iceweasel]

Sounds like you installed it wrong. Watch it while you try to operate the knob. I'll bet it isn't opening and closing the valve.

 

[MaryL]

You-tube, they can do step by step instructions on just about ANYTHING.