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I can't find where to check the filter in hydronic furnace (Rinnai 37AHB)

I feel silly - but I can't find where I can check/change the air filter in our new hydronic furnace. The user manual is not at all user-friendly, and only says that it needs to be changed, not how. There is no obvious place on the furnace itself where this could be - all areas are screwed shut. Does anyone know where the filter is located, or do I really need to have someone come out and change it for me every 3 months?

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  • Melissa
    Melissa Dec 31, 2013

    Nevermind - found it. If anyone else has this problem - there are 2 thumb screws on the furnace front. the filter sits on what looks like a coat hanger... (Side note - I miss my Trane furnace - much more user-friendly and the filter fit in more securely. This Rinnai furnace seems to be very cheaply made)

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Posted on Jan 02, 2017

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SOURCE: furnace filter on model gmt070-3a...

We had a similar question on our Goodman furnace, couldn't find where the filter goes.

Our furnace has two large metal covers that cover the lower and upper parts of the furnace in front, approximately 18 inches by 18 inches. The top one has a sticker that says "don't open equpiment, you may void the warranty". The filter is inside this compartment, at the bottom. You have to unscrew the screws that hold these two covers together, then just pull the filter out to change it.

I called the people who installed our furnace and aksed them if it really voids the warranty for us to open it up and they were non-comittal about it. Anyway, I opened it and changed the filter.

Posted on Jun 07, 2008

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ginko
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SOURCE: users manual for a rinnai 551f heater

Here is the owner manual : Rinnai wp

And here also an extra, the service repair manual:
Untitled

With compliments.

Posted on Nov 30, 2008

mrgrzz
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SOURCE: furnace blower not working how it should

first off buy yourself a honeywell stat, in my personal opinion lux stats are garbage, I have run into so many that are bad stats !!! but as far as your fan not shuting down, sounds to me like your fan center on your circuit board is bad and will not shut down the fan when needed, you will have to replace the circuit board, as the fan center is a part of the whole of the circuit board, hope that helps

Posted on Jan 20, 2009

t1m130
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SOURCE: Heil Gas Furnace Filters

the filters will go by your blower compartment remove the doors at the furnace and look where the sheet metal opening meets the furnace

Posted on Jul 26, 2009

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SOURCE: How do you change the air filter on a Ruud silhouette II furnace?

If it is a down flow, it will usually be found in the return air plenum just above the blower. You need to remove the front panels and look inside above the blower. You may need to remove a second door to access the blower section. If it is an upflow, remove the bottom door and look alongside the blower where the return air comes in.

Posted on Oct 04, 2009

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