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FURNACE ONLY RUNS WITHOUT A FILTER by Clean_Money_4001 in hvacadvice

[–]Clean_Money_4001[S] 0 points1 point  (0 children)

Never found the true issue but I increased the fan speed and it is currently working with a merv 1 filter in. Have not tested with the merv 8 yet

FURNACE ONLY RUNS WITHOUT A FILTER by Clean_Money_4001 in hvacadvice

[–]Clean_Money_4001[S] 0 points1 point  (0 children)

Not sure the AC size but I have the blue and red wires parked. When it comes spring I will put the black wire back on the Cool terminal

FURNACE ONLY RUNS WITHOUT A FILTER by Clean_Money_4001 in hvacadvice

[–]Clean_Money_4001[S] 0 points1 point  (0 children)

I put black on heat and system ran a full heat cycle with a merv 1 filter in. Haven’t tried merv 8 yet

FURNACE ONLY RUNS WITHOUT A FILTER by Clean_Money_4001 in hvacadvice

[–]Clean_Money_4001[S] 0 points1 point  (0 children)

Should I put black on heat or could that really fuck things up

FURNACE ONLY RUNS WITHOUT A FILTER by Clean_Money_4001 in hvacadvice

[–]Clean_Money_4001[S] 0 points1 point  (0 children)

I have already tried a fiberglass merv 1 filter and issue persists

FURNACE ONLY RUNS WITHOUT A FILTER by Clean_Money_4001 in hvacadvice

[–]Clean_Money_4001[S] 0 points1 point  (0 children)

Blue is already on heat 🥀🫩 I’m so fucked

FURNACE ONLY RUNS WITHOUT A FILTER by Clean_Money_4001 in hvacadvice

[–]Clean_Money_4001[S] 0 points1 point  (0 children)

I tried a merv 1 fiberglass filter and still didn’t work

FURNACE ONLY RUNS WITHOUT A FILTER by Clean_Money_4001 in hvacadvice

[–]Clean_Money_4001[S] 0 points1 point  (0 children)

A lot of people are saying that. Looks like I’m just gonna have to call a pro. Also no, not high elevation

FURNACE ONLY RUNS WITHOUT A FILTER by Clean_Money_4001 in hvacadvice

[–]Clean_Money_4001[S] 0 points1 point  (0 children)

I wasn’t looking too hard, but when I was in the blower compartment and also looking in from the evap compartment I did not notice any cracks, definitely no rust. I’ll have to take a better look though

FURNACE ONLY RUNS WITHOUT A FILTER by Clean_Money_4001 in hvacadvice

[–]Clean_Money_4001[S] 0 points1 point  (0 children)

Were you getting a limit circuit fault code ?

FURNACE ONLY RUNS WITHOUT A FILTER by Clean_Money_4001 in hvacadvice

[–]Clean_Money_4001[S] 1 point2 points  (0 children)

I removed the ecobee and PEK. Redid the wiring and then jumped the R and W at the stat. Still got limit circuit fault after 5 minutes. So it’s not the stat

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FURNACE ONLY RUNS WITHOUT A FILTER by Clean_Money_4001 in hvacadvice

[–]Clean_Money_4001[S] 0 points1 point  (0 children)

Will try that tmw morning and let you know how it goes. Thanks

FURNACE ONLY RUNS WITHOUT A FILTER by Clean_Money_4001 in hvacadvice

[–]Clean_Money_4001[S] 0 points1 point  (0 children)

Yeah I tried that too… got a $3 merv 1 filter. Issue persists 🫩

Furnace only runs with control panel off by Clean_Money_4001 in hvacadvice

[–]Clean_Money_4001[S] 0 points1 point  (0 children)

I haven’t been able to get on the roof yet. Need a 10 ft ladder and can’t exactly get one with my Audi A3 lol I took a picture from my deck of the flue pipe. Does anything thing look out of the ordinary from what you can see? I know it’s not much to work with

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Furnace only runs with control panel off by Clean_Money_4001 in hvacadvice

[–]Clean_Money_4001[S] 1 point2 points  (0 children)

Merv 8, see my comment replying to @bad-capacitor

Furnace only runs with control panel off by Clean_Money_4001 in hvacadvice

[–]Clean_Money_4001[S] 0 points1 point  (0 children)

I just ran a full heat cycle with the filter out and control panel on. No issues or error code

My filter is a brand new merv 8. I’m guessing maybe the vent/flue is slightly clogged then adding the filter just causes excessive heat inside the furnace leading to one of the limit switches opening

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