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Old 11-15-2008, 10:22 AM   #16
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Ruud Acheiver 90 Gas Furnace


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Originally Posted by 32FordCoupe View Post
when the tech installed the system(complete duct and all) this is what he reccomended for filters.
I doubt he checked to see what the static is of your system with those filters.

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Old 11-15-2008, 11:04 AM   #17
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Ruud Acheiver 90 Gas Furnace


electrostatic and pleated although being efficeint are real pains in the ass from most techs point of view they do cause issues with constricted airflow its likely your furnace has been doing this for some time,perhaps with less frequency until now
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Old 11-15-2008, 11:05 AM   #18
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Ruud Acheiver 90 Gas Furnace


no i dont think he did.You are right.I have the blower out of the unit and i can see that the heater core (HX)looks like it really clean.All nice and clean.I did however find upon pulling the blower out that there is insulation glued around the cabinet (inside)and a pc of that had fallen down on top of the blower.I will take some pictures and see if i can post them for you to look at and let me know what you think?

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Old 11-15-2008, 11:06 AM   #19
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what do you recommend as for putting great filter system in or filter?
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Old 11-15-2008, 11:38 AM   #20
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Ruud Acheiver 90 Gas Furnace


GLUE THAT INSULATION BACK or simply pull it out could it possibly be sucked in the fan?? and reduce the airflow? that may be part of your problem but i forgot removeing the filter helped so prob. not. filter reccom. 1 in pleated if you gotta have a real good filter and change it at least 4 times a year more if you have kids/animals
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Old 11-15-2008, 04:24 PM   #21
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Ruud Acheiver 90 Gas Furnace


Kennzz,
I glued the insulation back.It was laying flat on the top of the fan so i suppose it was only drawing on the bottom side of the fan.It could have been restricting enough airflow to break the limit switch and when the filter was out maybe it added enough to let it work?I have some pictures for you guys to look at.Let me know how to upload them here?
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Old 11-15-2008, 05:21 PM   #22
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Ruud Acheiver 90 Gas Furnace


Lets see if these pictures will work

Ruud Acheiver 90 Gas Furnace-dsc00333.jpg

Ruud Acheiver 90 Gas Furnace-dsc00334.jpg

Ruud Acheiver 90 Gas Furnace-dsc00335.jpg

Ruud Acheiver 90 Gas Furnace-dsc00336.jpg

Ruud Acheiver 90 Gas Furnace-dsc00337.jpg

Ruud Acheiver 90 Gas Furnace-dsc00338.jpg
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Old 11-15-2008, 05:22 PM   #23
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Ruud Acheiver 90 Gas Furnace


You can use a general(purpose) pleated filter. They are good but not to restrictive.
Not the 3M filtrete.
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Old 11-15-2008, 05:30 PM   #24
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you might look into making sure your fan is on one of the higher speeds too usually done by switching them around on the circuit board use the diagram to identify the speeds
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Old 11-15-2008, 05:52 PM   #25
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Its not that bad, but its not as clean as you might think.
The dirt you see on the insulation, is also in between the fins of the secondary.
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Old 11-15-2008, 06:38 PM   #26
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Ruud Acheiver 90 Gas Furnace


Thanks for the help fellows.I hope we can get it figured out.I guess the fan could have slowed down as it has been on the same speed for 10 years now.I figure i have a different issue and would like to find the problem before i change anything.I found the insulation on top of the blower wheel,and havent tried it yey since this.I can try another filter in it or try it like it is and see what it will do?I had very little dirt on the insulation and had very little bit on the blower wheel,which i cleaned and vacuumed out today.I think the secondary is pretty clean for 10 years?Let me know what you guys think i should do from here
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Rick
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Old 11-15-2008, 08:31 PM   #27
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Ruud Acheiver 90 Gas Furnace


the secondary is certainly clean enough to not warrant yanking it to clean it speeding the fan up can compensate for the restrictive filter. on the rating plate there is a rating for the range of differance between entering air and leaving air i think is listed as temp rise for instance if it says temp rise-45-75 and your entering(return) air temp is 70 degrees you should be looking for between 115- 145 degree supply air below that your moving too much air, above that not enough let the furnace run long enough for the temps to stabilize
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Old 11-16-2008, 06:35 AM   #28
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Kennzz and beenthere
I tried it this morning 1 time.Ran the temp up to 75 from 70 and it turned on and ran the whole time without an issue.It took forever to get up to temp(over 1 hr)Low pressure coming from the vents.I removed the filter while it was running and the pressure came back like it was new or first installed.I think its going to be the filters?Im going to install one of the pleated filters as you guys reccommened.So looks like it might be 2 bad electrostatic filters?
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Old 11-16-2008, 06:52 AM   #29
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Those filters don't release the dirt just using water to clean them.
Takes a soaking from a good cleaner.
I use simple green on them.

At this point though, it may be too late for your filters.
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Old 11-20-2008, 07:08 PM   #30
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Alright Fellows
I think we have this one done and ready to move on to the next one.I have a garage attached to the house,it has insulated walls,ceiling and all is completely plastered.Garage doors are insulated as well(2 in thick)The size of it is 24x36x10 foot ceilings.I want to cool and heat this as well.Anyone want to make any suggestions as what would be the best setup to use here?Let me know what you guys think?

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