how to diagnosis and replace hea
Altair Club Cars How to Diagnosis and Replace Heater blower motor and Resistor on Chevrolet Express Van

How to Diagnosis and Replace Heater blower motor and Resistor on Chevrolet Express Van

Here is a simple guide that should be able to help you with some of the most common basic procedures for diagnosing your Air Conditioner and heater that is no longer blowing air.

Hello ladies and gentlemen today i’m going to be walking you through on a couple things to diagnose why your heater is not working i am working on a 2002 chevy express 3500 van and our heater in this work van has recently stopped working this you were having here as none of these lovers are working you can hear some changes as you switch the dials which tells

Me that there’s power going to him there’s a couple things you’ll want to check before before just jumping in here but first thing you want to check is down here on the driver’s side there’s a little panel here when checking this down here it’s quite simple there’s a little lever here you just want to turn it to the right and then there’s a tab here pull out and

You will remove that panel on the back side of this panel you’ll see that there are a bunch of identifications for fuses here you see here on the top left there that 20-amp is a heater ac so that is one of the hvac fuses along with over here on the right there’s a 10 amp or our hvac fuse so go ahead and check both of those out anything that happens to stay here

Would be something you want to check out for these in my case none of my fuses are bad you’ll want to pop your hood come over here to the driver’s side and there’s another fuse compartment right here there are two tabs one on the back you just simply press it in and then there’s one on the front side there we see that it’s a little wet so let’s see if i can give

You a view here’s that tab right here put my hand in there you just simply press it in and lift out so i have already moved that you’ll want to check the fuses in here and see if there’s any hvac fuses that are blown alright so on the passenger side there are all of these wires you don’t want to follow these up into this compartment here and you will want to check

All of these wires to see if there are any melted wires check for loose connections and then if that does not work you can come up here to this very simple to check this so you can pop this off i just put my fingers in here and then right behind here i’ll show you right where my thumb is there is a seven millimeter bolt so you can remove this seven millimeter bolt

This whole piece will come out right here and then you could check the electrical connections on the back of that the very first thing i recommend checking is the fuses and then if you don’t find anything wrong there look for some heated or melted wires which is super common on many make and model vehicles and then we’re gonna snap all this back in very nice and

Simple so the next thing you’ll want to check this is very common this piece right here you’ll come and look at it these are five and a half millimeter screws here all of the screws that you’ll be removing as far as the heater goes are five and a half millimeter or seven millimeter five and a half can sometimes be a pain to get to but that’s what it is so this here

What you’d be looking for is you could look at this here you do not want the heater on when you are removing this because it can actually spark an arc and they could get you shocked so you would remove both of these it’s probably in there fairly good because there’s an adhesive sealant around it but you’ll want to remove this and inspect it and if you end up doing

What i’m doing i just recommend replacing this you could buy all of this for about thirty dollars i’ve come to the conclusion that my air is in my blower motor here so i will show you a quick way to test the see if it is likely that your blower motor is out such as mine so if you come over to this tab there’s a tab right on the bottom here you press it in and then

Pull that out and with the heater in the on position if you have this accessible you can use a multimeter it doesn’t have to be anything fancy but you can put two prongs in here which i’ll show you real quick and see if you’re getting twelve volts in here okay so you can see my really fancy old multimeter here you want to set it to dc volts and then i just have it

On the smallest setting here right there and then we’re going i have two here in the on position in order for this test to work properly you will want the key in the on position as well vehicle could be running but we don’t need it running for the sake of you being able to hear me it doesn’t matter which one goes in which side you’ll get a negative on the screen

But you’ll still get 12 volt if it’s in the incorrect side so you can see there that we are at 11 point 6 volts which is okay anything you know the car has been sitting here with the lights on the stuff so the battery is drawing down and the headlights are on so we’re sitting at that there even if it ends up being a negative number this test oh works so what this

Tells us here is that there is power gating to the fan so if there’s power getting to the fan and the fan is not functioning it is very likely that this motor has failed after 18 years of hard work we used these vans all the time and we do punish them so i have picked up a new resistor and a new blower motor and you can expect to spend about $100 at your local

Parts store for these two items i will have links below showing you exactly which items you would want and i will also show you the part numbers on the resistor and the blower motor if they’re applicable on here so let’s go ahead and start removing this all right so the very first thing we’re gonna do is right here on top of the reservoir for the coolant we were

Going to remove this this here is a 10 millimeter add that out of the way and then this here should lift up and as you can see here there’s some tabs on the top here you’ll want to just pull this out so we’re gonna walk it out and that’s that i’m not gonna worry about removing that any further out of the way because we have plenty of access to the here and now

We’ll go ahead and tackle that there so the next thing we’re gonna do is we’re gonna come over here it looks like there are 1 2 3 4 five there’s five five-and-a-half millimeter screws that you can remove them remove this wiring out of the way the key is in the off position along with the heater is also turned off so we’re gonna go ahead and start removing this

Make sure you don’t drop these little screws put them in a pocket here so you can get away with not replacing or removing all the screws that i counted but i’m gonna remove them to keep some of the wiring out of my way and for the sake of the video so that you can see everything that i’m doing so there are looks like three only three screws holding the motor and so

The motor can come out now so i’ll just pull it out like this i was gonna remove the whole thing and there we have the mower so it is not spinning very freely and i can hear some pretty rough turning going on in there so we’ll open up the box and compare this to the new one i’m hoping the new one comes with this hose and gasket as well next thing we’re gonna next

Thing we’re gonna do here is we’re gonna come up here to our resistor here so those are also five millimeter so you’ll want to remove those sorry five and a half millimeter and then once you remove this this here i have removed it already previously when i was testing everything but it was on there very tight so you just have to wiggle it back and forth and try

To work it loose it’s already on there pretty tight again but the adhesive they use is very sticky so there we have that and then in order to remove this the rest of the way you would take this tab right here and you’ll pull it outward and this here will take some finesse because you do not want to break this so that only came off that easy because i’ve already

Removed this when i was testing it but this here you’ll maybe use a small flat-head screwdriver in between the plastic here and and this right here and just be really careful you don’t want to crack this it’s here if you’re replacing it doesn’t matter if it breaks or not but it’d be nice to keep all this salvageable because it’ll be a pain if you break it and have

To deal with that so i will show you here this is what the resistor looks like there is an oem part number on it so i know that the parts that i’m removing are the original parts of the vehicle because they are even dated alright so i am here comparing the new blower motor to the old one the size of the actual fan itself is it’s much larger on the original fan here

So this is larger you can see here but it does mount up the exact same all the fittings and electrical connections match so you can see here instead of it just being directly mounted on the blower motor you have a pigtail off the new one to plug in looks like you also have some weather stripping to put around here to seal the seal the perimeter here so you want to

Put that on there next we will compare our resistors so here’s our old resistor again this is over 18 years old and you have it there here’s our new one this is what you will find in most newer vehicles this style of resistor you want to be really careful with this and you can see there the pigtails the exact same so we’re gonna go ahead and reinstall these in the

Reverse order alright so i did run into a little bit of a hiccup while doing this you can see here that that resistor takes up quite a bit more space has these plastic prongs on the outside there to keep it from touching any of the plastic housing then this one here is straight and flat so as far as that goes i will need to cut the box and fabricate it to fit the

New resistor i did call the dealer and i cross-reference the parts and the new resistors are like this they do not make them the style anymore again this resistor is over 18 years old so it makes sense they do burn out all the time although this one may to 18 years which is pretty rare so there is the oem part number again right there if you give that to your local

Parts store they will give you a resistor that still looks like this little disappointing that they have to cut it but it won’t be too hard and i’ll show you what i do to do that so here we go alright so we ran into a little hiccup with the resistor so we’re gonna have to fabricate the box a little bit but until then we are going to reinstall our blower motor when

Reinstalling it you do need to reattach your new or your old gasket on here including your little hose here so we’ll go ahead and get that done and then we’ll set this in place you so your new blower motor will have come with this gasket here i just put it on this lip around the outside here this should not touch the fan at all and then we’re gonna go ahead and

Reposition it here so i’m trying not to slide it i know the tube went down before because it needs to tie into right here where my finger is so there we have that in position and then you will take some of your five and a half millimeter screws and just get one started here once it started we can start fastening the blower motor down remember after you install all

Three of your screws to reconnect your hose on the bottom right here where my finger is so this part may be a little tricky i’m going to take and line it up as possible and then once i have it lined up i’m going to use a sharpie and on those plastic tabs i’m just gonna mark where the tabs are so you can measure this however you want to measure it i’m just using what

I have on hand here i’m taking something and i’m lining it up to the edge of this have these battery packs here and i measured from the edge here all the way to the edge of the plastic and then i did the same thing with the other side here and as long as you don’t over cut this you should be fine you won’t have to do any additional work here so i’m gonna match it

Up one more time so though the longer cut is going to be on the side near me so i’m gonna take this here put it on the edge and then i’m gonna make a straight line so when i say put it on the edge there is already a shadow there and with this here but it all the way up against these the plastic pieces so we’ll do this we give you the same thing with the short side

Now i’m doing the top line there so that there gives me my minds that i’m going to cut alright so there is my cut out it is not amazing by all means this is a scratch not a crack the hardest part was making sure pieces don’t drop into the hole i did use a razor blade and i found that cutting these lines right here first so if you’re cutting it takes time but you

Cut into it like this and then just score it across the top and then just with your fingers or a pair of pliers you can wiggle it back and forth and it’ll just it’ll just break off for you and it should break off in one solid piece i was able to get them to break off and large pieces which was nice and now this here my new resistor right in there so we have that

One matched up and you can see over here if that hole is matching up as well so now we can go ahead and fasten that down so now we have our resistor in place i’m going to tighten it down here make sure everything feels good feels nice and sturdy i was making sure that it wasn’t bowing or anything like that because i wouldn’t want it to flex inside there and cause

Some damage now that we have that we are going to plug this in it can only go on one way it will be a little tough to snap in there once you get it in make sure that fastener is put down not sure what this little loop is for but i’m gonna use it for connecting my harnesses here so there’s that the last thing you’ll need to do is you’ll come over here install your

10 millimeter bolt here for your reservoir and now we will do our test so we have the low speed on the vehicle is not running it’ll be too noisy so it looks like all four speeds work and it sounds like they’re working good i just want to say thank you to everybody that is watching this video for supporting my channel very much appreciated if you have any questions

Or comments please feel free to list them down below and i will respond to you quickly again i’ll post the links to the parts that are used in the video down below and i’ll find the best price available for you and thank you again for watching and have a fantastic day

Transcribed from video
How to Diagnosis and Replace Heater blower motor and Resistor on Chevrolet Express Van By TweekerDan1984

Related Post