Just installed megasquirt pnp in my 95 miata and fan isnt working - Miata Turbo Forum - Boost cars, acquire cats.

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Old 09-08-2007, 05:40 AM   #1
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Default Just installed megasquirt pnp in my 95 miata and fan isnt working

I just installed my new mspnp9495 and i love it. the only problem is my heating and air dont work. The fan isnt coming on. I can hear the ac compressor come on when i turn the ac on but neither ac nor heating will blow air.

Thanks in advance for any help!
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Old 09-08-2007, 06:04 AM   #2
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so the blower motor isn't coming on or the cooling fans?
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Old 09-08-2007, 09:38 AM   #3
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I'd be shocked if the ecu ran the climate control fan. Suggest you start trouble shooting as you would any other electrical circuit (ground, fuse, relay, etc).
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Old 09-08-2007, 11:55 AM   #4
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by cooling fan do you mean radiator fan cause thats not what im talking about. whatever physically blows air out the vents isnt working.
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Old 09-08-2007, 12:10 PM   #5
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and if you plug the stock ECU in again, the blower works again?
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Old 09-08-2007, 06:28 PM   #6
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I got your email on this as well, but whenever I get the same question in email and on the forums at the same time I have to respond here too of course, so you've already gotten this info, but here it is again

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That's interesting-- can you check the blower motor fuse, I wonder if by some fluke it popped around the same time? The ECU (stock or MSPNP) doesn't control the blower speed at all so that's what's puzzling. It does get a signal telling it the blower is on, but it's not controlling the blower. We didn't have to do anything special to make the blower work at all, but we did have to in order to make the ac compressor and ac condenser fan operate. Does the passenger side fan behind the radiator come on with the AC button/fan (blower switch and button have to be on at the same time)?

Let me know what you find and we'll get to the bottom of this one...
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Old 09-08-2007, 07:22 PM   #7
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yeah, by some chance my blower motor fuse popped at the same time. Pushed the button and it worked. I should have checked that first but it was around 5am and i had been working on the car all night.
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Old 09-08-2007, 08:20 PM   #8
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Glad to hear it man, just happy to hear all is sorted out for you!
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Old 09-08-2007, 08:59 PM   #9
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thanks for your help!
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