[The_man123]

When I turn my furnace on , my exhaust blower comes on but my ignator will not turn on. The ignator is good and I got a new board.

[Grady White]

Do you have 120 volts to the ignitor?

[The_man123]

No, it doesn't have 120 volts to the ignitor.

[Grady White]

Does the control board blink any sort of code? If so, find the key to that code (often inside the blower compartment door) & let us know what it says.

[The_man123]

It doesn't blink , and I got a new board.

[Grady White]

It sounds like the pressure switch is not closing. If there are two terminals on the switch, connect your volt meter across them & create a call for heat. Before the exhaust blower starts you should get 24 volts AC. Almost as soon as the exhaust blower comes on, the reading should drop to zero.

[The_man123]

Ima try it out (:

[The_man123]

It has 24v before the blower starts and when the blower starts it stay at 24v

[Grady White]

For some reason the switch is not closing. The next step is to VERY gently suck on the hose going to the pressure switch & listen for a click. If you hear the click, you know the switch works. Remove the hose from the exhaust blower & clean the fitting with a piece of wire or drill bit (not in a drill). Reassemble, try it, & let me know what happens.

[The_man123]

Yes the pressure switch clicks but the other side where the hose goes into the blower it doesn't suck air.

[Grady White]

Did you try to clean the nipple where the hose connects to the venter?

[ma0641]

Sounds like the plenum port is clogged. Clean it out with a coat hanger or sized drill bit.