Weak a/c and heater
#1
Boost Czar
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Weak a/c and heater
Worked fine when I left the car in Oct.
Dad complained that the a/c wasnt working well a couple weeks ago, I called him silly.
Now that I'm driving the car again, I can say, yes, the a/c doesn't blow cold...but the compressor is engaging.
But, on top of that, the heater isn't blowing very warm at all.
I did a quick poke up under the dash and it appears all the ***** and pulleys are working, and if I do change from warm/cold or the different vents there is change in temp/flow.
But I have noticed that when i set it to floor, it will still come out quite heavily out the main vents.
Think I developed some sort of leak in the system somewhere?
My feets are cold the morning!!!! I don't see how I can possibly have low heater temps when the coolant is getting up to 180°F
Dad complained that the a/c wasnt working well a couple weeks ago, I called him silly.
Now that I'm driving the car again, I can say, yes, the a/c doesn't blow cold...but the compressor is engaging.
But, on top of that, the heater isn't blowing very warm at all.
I did a quick poke up under the dash and it appears all the ***** and pulleys are working, and if I do change from warm/cold or the different vents there is change in temp/flow.
But I have noticed that when i set it to floor, it will still come out quite heavily out the main vents.
Think I developed some sort of leak in the system somewhere?
My feets are cold the morning!!!! I don't see how I can possibly have low heater temps when the coolant is getting up to 180°F
#5
I don't know if the NA's have the same setup as the NB's. But check the cables coming from the hvac controls along both sides of the trans tunnel. I had a similar problem when I pulled my dash and put it back together (badly). There's a billion flaps that block the heater core on the driver's side and on the passenger side they adjust the air flow. Sometimes the levers that are connected to the cables get jacked up and needs to be manually moved around.
Check the link for pictures and a better explanation of what's going on:
http://www.miata.net/garage/heater_cable.html
Check the link for pictures and a better explanation of what's going on:
http://www.miata.net/garage/heater_cable.html
#6
I don't know if the NA's have the same setup as the NB's. But check the cables coming from the hvac controls along both sides of the trans tunnel. I had a similar problem when I pulled my dash and put it back together (badly). There's a billion flaps that block the heater core on the driver's side and on the passenger side they adjust the air flow. Sometimes the levers that are connected to the cables get jacked up and needs to be manually moved around.
Check the link for pictures and a better explanation of what's going on:
http://www.miata.net/garage/heater_cable.html
Check the link for pictures and a better explanation of what's going on:
http://www.miata.net/garage/heater_cable.html
#7
Boost Czar
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Join Date: May 2005
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I'm pretty sure all the flappers are working, but ill double check.
it was working for sure in Oct when I left the car with my Dad for winter. He complained and when I picked it back up in March it wasn't working well for sure.
I can move from hot to cold, and there is a bit of a difference. Recirc/outside works, I've verified that. I have noticed that when i move it to feet only it blows out of the main vents still, that's not normal.
the heater is barely getting warm, maybe blowing 60°F, well after the car reaches 170°F. The a/c is nonexisitent but the compressor is engaging.
it was working for sure in Oct when I left the car with my Dad for winter. He complained and when I picked it back up in March it wasn't working well for sure.
I can move from hot to cold, and there is a bit of a difference. Recirc/outside works, I've verified that. I have noticed that when i move it to feet only it blows out of the main vents still, that's not normal.
the heater is barely getting warm, maybe blowing 60°F, well after the car reaches 170°F. The a/c is nonexisitent but the compressor is engaging.
#20
Boost Czar
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Join Date: May 2005
Location: Chantilly, VA
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I was up under the dash yesterday. All the sliders have full articulation at the flappers.
the hot/cold will change from just below ambient (with a/c acitvated) to luke warm (with heater). Viewed from right side of center console.
I can watch the recirc slider open the flapper at the blower motor in order to source air from behind the glove box or up through the intake vent.
All the vent positions change. Viewed from right side of center console, verified flow with my face/hand.
so unless there's something else in the box behind the center console that might be stuck/blocked I dont quite see what the dealio could be.
The heater core inlet is hot as ---- and scolds me if it touch it. I can bare a few second on the outlet...so that makes me think the core isn't blocked.
the hot/cold will change from just below ambient (with a/c acitvated) to luke warm (with heater). Viewed from right side of center console.
I can watch the recirc slider open the flapper at the blower motor in order to source air from behind the glove box or up through the intake vent.
All the vent positions change. Viewed from right side of center console, verified flow with my face/hand.
so unless there's something else in the box behind the center console that might be stuck/blocked I dont quite see what the dealio could be.
The heater core inlet is hot as ---- and scolds me if it touch it. I can bare a few second on the outlet...so that makes me think the core isn't blocked.