HVAC Questions? Ask an HVAC Expert for Answers ASAP
Hi, I'm Brian. I'm here to answer your HVAC question to your complete satisfaction! Are you receiving my chat message today?
Ok great. By your explanation and the symptoms it appears there is an issue with the inducer draft motor/blower. Since the unit is detecting a fault sensed by the air pressure switch and the flames are not being sucked into the burner/heat exchanger.
Things to look at are making sure the inducer motor is running, that the flue is clear all the way outside and isn't full of water and that the blower wheel on the inducer is actually spinning.
Guessing I should be looking to replace the inducer motor? What should I expect for installation charges, and would there be any other components that need replacing with it.
whoops just saw the seconf half.
okay, lets work backwards here. blower wheel on the inducer. (outside black wheel?).
You can't see the blower wheel on the inducer blower assy without removing the motor. They are typically a 4"X2" or so plastic wheel and are usually white or off white.
my guess is the blower isnt moving... how hard is this to replace or more importantly get parts for
They are usually not difficult to replace. Availability depends on how new the model of furnace is. Brand new models may not have parts available except through HVAC parts wholesalers. I can do some research on that model and see if I can find one online though.
Yea, this is from 1994 or so
That should be available online for sure. Would it be ok if I save and close our session for 15 mins or so and I will see what I can find for you?
Sure, do i just leave the page open?
Yes, you can leave it open and that's fine but I am limited to locking the question every five minutes if I leave it open on my end. It makes research a little difficult :)
I'll be back soon with some answers for you.
Ok I have found an inducer kit for your furnace and some manuals as well.
Here is the kit for your inducer that has all you need including the motor and wheelhttp://shortyshvac.com/index.php?main_page=product_info&products_id=38
And here is a service manual and also an instruction sheet for that kit
If you look in the service manual it gives instructions to remove the inducer motor as a part of the heat exchanger cleaning procedure.
sorry took a minute to get those to open...got it. Thanks. Is there any possibility the problem could be with the draft safeguard or pressure switch? And if so should i replace those at the same time?
Is there a way to test the inducer motor by hotwire
It's also a good idea to take off the tubing on the pressure switch and make sure there is no gunk or dust build up in them and spray them out with canned air.
actually did that before...forgot to mention it. tubing was good. thats why i bypassed it and jumped the orange from the draft safeguard to the yellow on the motherboard
Ah well you are way ahead of me then! :)
Yeah it definitely sounds like the motor to me but you should try to ensure the inducer motor is getting power when the system is calling for heat. That will confirm it.
If the inducer motor is NOT getting power when calling for heat then the control board relay (hence the control board itself) is bad.
Ah let me see
i would need a voltage meter to do that (I'm guessing). Here is a thought. when i jumper the test pin to the com24 port the black wheel outside the inducer spins for about 2 secs then stops. When I call for heat zip!
If I bypass the pressure switch there is no movement from the wheel either.
I do recall in the past i sensed there was a short on the board and if i jiggled the wires it often engaged. perhaps the board is bad as well
Yep that pretty much confirms the inducer motor is shot. The pressure switch is only proof that the motor is running so I wouldn't help the motor to run. The motor is called for basically as soon as heat is called for. It is the first link in the chain and nothing else happens until the pressure switch proves there is induced draft.
It's possible that the board has an issue and yes it would take a volt meter to confirm that.
Okay, is the same supplier likely to have a circuit board as well. Just in case :)
Yes they most likely will. If not then Pexsupply.com will have one
Give them a try...thanks Brian.
You are most welcome! Good luck!
hows weather out east... thinking of hitting Ft. L in a few weeks
Haha... profile showed you as FL....