How Hard Is It To Clean My Blower Unit ???

pcb

The Diagram Dude
:
2002 MP5
I'm figuring that I've got 12 years of dust and crud built up in my HVAC system and I'm wondering how hard it would be to try to clean it out.

I'm not interested in pulling my dash out to do it and was wondering if there is any "shortcuts" or techniques that you guys know of.
 
:
2003 Mazda Protege 5
pull out the glove box, unscrew a couple screws and the blower motor comes right out the bottom of the whole assembly. if you get under you'll see everything with a flashlight, it'll take max 5 minutes to take out.
 
:
2002 Mazda Protege 5
pull out the glove box, unscrew a couple screws and the blower motor comes right out the bottom of the whole assembly. if you get under you'll see everything with a flashlight, it'll take max 5 minutes to take out.

Good to know.. I think just about everyone is about due for a blower motor cleaning if they haven't already.
 
:
2003 Mazda Protege 5
to add to my instructions, here is the page from the service manual

@flav mine was certianly due as last year, the motor seized up on me at the beginning of a 4 hour trip from windsor to mississauga in 30+ heat.

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pcb

The Diagram Dude
:
2002 MP5
Thanks,... I'll start with that.

Do you know if it's possible to clean the fins on the heater core and evaporator ???

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31N007

31N007
:
Mazda Protege5
Funny you asked about this. I almost took mine apart yesterday. There's a plug that's near the front I think its the amplifier. I should think you can put a vac hose in there and suck the crap out. There was a ton of junk in there that I pulled out by hand. Glass too, from when it was in an accident ..

The screws on the blower motor looked good but there was one towards the back that was well rusted. Not sure if it's like that on all our cars nowadays?
 

pcb

The Diagram Dude
:
2002 MP5
I'm thinking the fins on the evaporator especially might be pretty nasty. With the dust and dirt mixed with the water that forms, we could have a layer of something like paper mache that stinks like a wet rag and reduces efficiency.

I figure if I could remove that layer of "carpet" on the fins, the AC would work better.

I'll look for that plug opening and hopefully I can get in there enough to clean the fins a bit. Maybe a small bottle brush or pipe cleaners will help.
 

pcb

The Diagram Dude
:
2002 MP5
Well I managed to get my duct work cleaned out.

Start with removing the glove box, then remove the two screws holding the resistor pack.

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Then remove the two screws holding the box around the AC condensor together. This allows the box to open up far enough to get inside. I used a toothbrush to clean the fins. It wasn't nearly as bad in there as I expected.

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Then I removed the blower motor and it too was in really good shape. I had to remove the side trim and a relay thing to gain access to the three screws holding in the blower.

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But then I decided to get all carried away and remove the squirrel cage (impeller, fan blades) to service the motor.
That's when things kinda went south and I almost ended up with no wind at all due to breaking the squirrel cage. The rod from the motor was all rusty and didn't want to let the squirrel cage slide off.

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Then I removed the dust cap to expose the felt and saturated the felt with oil. I bought this oil for the motor,.. it say's it's for electric motors and sewing machines.

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Then I put everything back together and it's all working.



I never did clean the heater core,... I'm not even sure where it is ??? But it was the cooling unit I was most concerned about and the air blows through it first. I thought I'd leave well enough alone and just say good enough.
 
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