Kenmore furnace two stages
M/N : C9MPT07514A3
G/V smart valve 9541

Call for heat there , the furnace kicks on however the inducer goes off half way that means when it is going to light up the HSI .
Checked out the board that is OK
Checked out the inducer is OK
Checked out the blower fan that is OK
P/S closed and shows 24vac on airflow C and NO

Any comments will be appreciated

M/N :C9MPT100J16B1
G/V smart valve SV9541

Replaced the smart valve and now come across a big problem:

Call for heat is there , the furnace is humming however the inducer does not get energized . Waited for more than 5 minutes and no go at all.
The inducer found to be OK
The blower OK
The board was replaced with a new one and the problem still there .

Any comments will be highly appreciated .

Must be a limit or rollout. Pressure switch

The only thing that would stop the vent motor is a limit, or loss of heat call

The only thing that would stop the vent motor is a limit, or loss of heat call

You absolutely right however there is no limit on the way but three rollout arount the burner box which are all OK and no problems .
Tks for quick answer again .

Does the control board give a fault?

does the control board give a fault??

No not at all . There is no led on the control board . However I replaced it with a new one and the problem still there .

must be a limit or rollout. pressure switch

I put in a new pressure switch and still the problem there . Tks for quick answer

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I put in a new pressure switch and still the problem there . tks for quick answer
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remove the draft motor and the tube to the P/S. make sure its free from moisture and shake the draft motor to be sure there is no water collecting in it.

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remove the draft motor and the tube to the P/S. make sure its free from moisture and shake the draft motor to be sure there is no water collecting in it.

Tks for the answer . I have already done that and put the motor on test , it is working fine . Tks agn