heater blower.
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Senior User
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do you have a link to that 3spd?
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From: Marlborough, CT
I've got a basic off/heat/defrost heater in my truck, has a 3 speed switch. Are you sure the resistor pack is ok? A bad diode will not allow full fan speed. Also, when I got my truck I had to remove the blower motor and snake a small diameter hose cobbled to a shop vac into the opening to remove mouse nest and other debris that was blocking air flow. ~Bill
pedant
Joined: Jan 2008
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From: EXTREME southwest CT
When the resistor pack blows aren't you only left with high speed?
That was why I asked about debris in the fan.
"Yep,it's all fine, just doesn't push enough heat"
If it blows better with the heat selector on cool, I would look at a blocked heater core.
That was why I asked about debris in the fan.
"Yep,it's all fine, just doesn't push enough heat"
If it blows better with the heat selector on cool, I would look at a blocked heater core.
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From: Marlborough, CT
It depends on what failed in the resistor pack. They can go either all speeds but high, or high only, or weird things in between if there's wet debris stuck in the coils. ~Bill
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pedant
Joined: Jan 2008
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From: EXTREME southwest CT
Well, a resistor is only about $20.
The motor/fan assembly is pushing 100 for a decent one.
I would still do some investigating.
RCG85 seems to think he has only one speed...
The motor/fan assembly is pushing 100 for a decent one.
I would still do some investigating.
RCG85 seems to think he has only one speed...
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its like it needs a 4th speed. we done checked the inputs and outputs there clear.just dosent have enough heat to push out.
it dosent have ac.so couldnt tell you if it blows better with the ac on.
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From: Los Angeles
I've got to look at mine when I get time, it's defaulted to vent. I'm guessing vac line but haven't had time to tear into it.
You might can look into a fix like I had to with my hot water for my house. I have terrible water pressure(volume) so I increased the temperature, thus requiring less volume.
I wonder if a better/newer heater core could solve your problem. Im not sure if there are options here but it could be worth exploring if there are no problems with everything mentioned above.
More air moving over the same amount of surface area at the same temp would theoretically provide cooler air to the end point.
You might can look into a fix like I had to with my hot water for my house. I have terrible water pressure(volume) so I increased the temperature, thus requiring less volume.
I wonder if a better/newer heater core could solve your problem. Im not sure if there are options here but it could be worth exploring if there are no problems with everything mentioned above.
More air moving over the same amount of surface area at the same temp would theoretically provide cooler air to the end point.
pedant
Joined: Jan 2008
Posts: 23,576
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From: EXTREME southwest CT
Take the half the engine -and- the dashboard out so you can change the plenums from both sides of the firewall?
I still don't understand if the OP is complaining about a lack of volume, or the temp of the air coming from the vents.
And, I didn't say "A/C", I said cool... as in the blue area.
If the air volume increases when the heater core is bypassed, the core is clogged with dust, corrosion, or something.
My truck doesn't have air conditioning but when it's this cold I turn 'outside air/ heat' to 'off', so the core is not trying to fully heat a fresh charge of 3* air in one pass.
Slowing the fan down also allows the heater core more time to transfer heat.
I still don't understand if the OP is complaining about a lack of volume, or the temp of the air coming from the vents.
And, I didn't say "A/C", I said cool... as in the blue area.
If the air volume increases when the heater core is bypassed, the core is clogged with dust, corrosion, or something.
My truck doesn't have air conditioning but when it's this cold I turn 'outside air/ heat' to 'off', so the core is not trying to fully heat a fresh charge of 3* air in one pass.
Slowing the fan down also allows the heater core more time to transfer heat.
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From: Denver Metro Area, CO
Correct! i don't know that, either.... What to do is dependent on what the problem is. But with no indication as to what the actual problem is, everything is just shots in the dark or pissing in the wind....
Laughing Gas
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Confession,
I replaced a heater blower once and reversed the wires. The fan ran fine, only backwards. It did put out a little warm air like that but not very much.
Funny thing was the wire colors matched...black to black and red to red IIRC.
Took me quite a while to figure that one out.
I replaced a heater blower once and reversed the wires. The fan ran fine, only backwards. It did put out a little warm air like that but not very much.
Funny thing was the wire colors matched...black to black and red to red IIRC.
Took me quite a while to figure that one out.
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From: Los Angeles
Confession,
I replaced a heater blower once and reversed the wires. The fan ran fine, only backwards. It did put out a little warm air like that but not very much.
Funny thing was the wire colors matched...black to black and red to red IIRC.
Took me quite a while to figure that one out.
I replaced a heater blower once and reversed the wires. The fan ran fine, only backwards. It did put out a little warm air like that but not very much.
Funny thing was the wire colors matched...black to black and red to red IIRC.
Took me quite a while to figure that one out.
I can't laugh at this, karma bring what it is and all.
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