Heil HVAC unit fan won't go on help!

rivera76 · 08-28-2009, 09:03 PM

My coil is frozen and my fan does not go on can anybody help?

Plumber101 · 08-28-2009, 09:12 PM

Can you remove the panels on the furnace and reach in and ry to spin the blower wheel by hand.

If it doesn't spin then the motor is fried.

If it does spin look at the control board and locate the thermostat connection terminals. Make a jumper wire and jump the R & G terminals.
You will also have to push in on the safety switch that the panel normally closes.

rivera76 · 08-28-2009, 09:19 PM

Fan spin normally (by hand). Made the jumper and held the door switch and still nothing.

Plumber101 · 08-28-2009, 09:31 PM

DOes the control board have a LED?

If it does when you push the safety switch in does it come on?

If it doesn't check power to the furnace. If it does, does it flash or pluse?

Check also off the control board to the blower motor the cool terminal voltage. "Cool" term to ground should be 120 vac

rivera76 · 08-28-2009, 09:50 PM

No LED. I need to check the power.

rivera76 · 08-28-2009, 10:07 PM

we have power.

Plumber101 · 08-28-2009, 10:09 PM

Well you said that the coil is frozen so there is power to the furnace. Now check power to the blower motor. Normally the black wire to the motor. If you have poser off the control board to the motor. The next step is to look at the capacitor.

Does it look budged?

rivera76 · 08-28-2009, 10:14 PM

If I move the black wire from cool to cont the fan goes on. Will this be ok to run this way?

Plumber101 · 08-28-2009, 10:16 PM

It should work as a temp fix.

Sounds like you have a control board that has gone bad.

HvacWiz · 08-28-2009, 10:17 PM

yes you can run it like that, sounds like you need a new circuit board.

rivera76 · 08-28-2009, 10:20 PM

this will make the fan run continuos correct?

Plumber101 · 08-28-2009, 10:22 PM

yes it will

kenmac · 08-29-2009, 09:25 PM

Quote:

Originally Posted by Plumber101

yes it will

Not trying to hijack this thread... But , I've been away a while & just wanted to know if plumber ever got the M.H. to cooling correctly/ok

08-28-2009, 09:03 PM	#1
rivera76 Newbie Join Date: Aug 2009 Posts: 6	Heil HVAC unit fan won't go on help! My coil is frozen and my fan does not go on can anybody help?

08-28-2009, 09:12 PM	#2
Plumber101 GC/Master Plumber/Mech Join Date: Feb 2009 Location: Hays, KS Posts: 1,467	Heil HVAC unit fan won't go on help! Can you remove the panels on the furnace and reach in and ry to spin the blower wheel by hand. If it doesn't spin then the motor is fried. If it does spin look at the control board and locate the thermostat connection terminals. Make a jumper wire and jump the R & G terminals. You will also have to push in on the safety switch that the panel normally closes. __________________ John Wayne once said "Life is tough and it is even tougher if you are stupid" Tempstar and Trane Dealer

08-28-2009, 09:19 PM	#3
rivera76 Newbie Join Date: Aug 2009 Posts: 6	Heil HVAC unit fan won't go on help! Fan spin normally (by hand). Made the jumper and held the door switch and still nothing. Last edited by rivera76; 08-28-2009 at 09:31 PM.

08-28-2009, 09:31 PM	#4
Plumber101 GC/Master Plumber/Mech Join Date: Feb 2009 Location: Hays, KS Posts: 1,467	Heil HVAC unit fan won't go on help! DOes the control board have a LED? If it does when you push the safety switch in does it come on? If it doesn't check power to the furnace. If it does, does it flash or pluse? Check also off the control board to the blower motor the cool terminal voltage. "Cool" term to ground should be 120 vac __________________ John Wayne once said "Life is tough and it is even tougher if you are stupid" Tempstar and Trane Dealer

08-28-2009, 09:50 PM	#5
rivera76 Newbie Join Date: Aug 2009 Posts: 6	Heil HVAC unit fan won't go on help! No LED. I need to check the power.

Heil HVAC unit fan won't go on help!