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Old 2017-11-30, 02:33 PM
alwaysonnet alwaysonnet is offline
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Default Strange stains and filter looks dirty

For the past few days, I am noticing that carpet became dirty near heating vents / registers. HVAC filter is so dirty and black soot is formed on the filter. I am concerned of what could be the possible issue. I moved into new home in May 2017. any ideas / suggestions to take necessary action.

PS: Images are not actual but they looks exactly same in my home
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Old 2017-11-30, 02:46 PM
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That is not normal unless it was there before you moved in. Construction debris can cause issues, however if you changed your filter regularly then nothing should be like that.

I would recommend contacting your builder and asking them to have a look at it. It suggests there may be something going on with your HVAC system.
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Old 2017-11-30, 04:12 PM
alwaysonnet alwaysonnet is offline
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These are real photos from my home. I contacted the builder and left a voice mail. No call back yet.
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Old 2017-11-30, 10:14 PM
Mark & Lynda Mark & Lynda is offline
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Have you ever changed the filter? May to Nov is 6 months and if you've never changed the filter it could possibly be 9-10 months old assuming the furnace ran in the winter during construction.

The filter should be changed quarterly (every 3 months).
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Old 2017-12-01, 10:14 AM
alwaysonnet alwaysonnet is offline
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I change them bi-weekly to monthly. At first, I used filters from Costco and they are little pricy. When the filters are getting fast dirty, I switched to filters from Home Depot and changing them very frequently.
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Old 2017-12-01, 10:33 AM
dvg dvg is offline
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yikes. no idea what could be introducing all that into your house.

Not that this is the solution, but Id recommend the cheapest filters available at walmart. I didnt like how the rock catchers at home depot have no real filtering at all, but didnt want anything too fine as to stress the furnace blower. The basic pleated filtrete filters at walmart are a happpy medium
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Old 2017-12-02, 12:01 AM
TKG26 TKG26 is offline
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have u resently started to burn candles?

Some candles create soot that can cause this mess on filters
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Old 2017-12-03, 08:27 AM
Halton Home Inspector Halton Home Inspector is offline
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Black mold on the AC evaporator coil, carbon monoxide from your furnace, a poorly vented wood burning fireplace, or soot from candles can all cause black filter. You need to either stop burning so many candles, or call a chimney sweep, or call for furnace service asap.
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Old 2017-12-04, 03:32 PM
alwaysonnet alwaysonnet is offline
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Nope. We never burn candles inside the home.

From the builders rep, I understand that burner in the furnace needs an adjustment. I am waiting on the HVAC contractor appointment.
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Old 2017-12-05, 09:10 AM
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Quote:
Originally Posted by alwaysonnet View Post
Nope. We never burn candles inside the home.

From the builders rep, I understand that burner in the furnace needs an adjustment. I am waiting on the HVAC contractor appointment.
I don't see how a burner problem can cause this or how an adjustment can fix what you are seeing. Your furnace vents to the outside in a closed system. Suggest you check the outside pipe. Is it black with soot on the inside?

I'm wondering if your heat exchanger is cracked allowing combustibles and soot into the air distribution system.

What is causing black crud to get on the filter and blow through the whole house? And how does that happen in the summer when the furnace isn't running?

Do you have an hrv running? Check for black crud inside there.

Also check your hw heater exhaust for black crud inside its pipe.

Last edited by good2know; 2017-12-05 at 09:15 AM.
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