Dear customer, hello!
                                     Generally resulting in "on the fan is not turning the ignition" in such cases for the following reasons:
                                     1, the pulse ignition bad

                                     2, the pressure switch is broken

                                     3, smoke tube blockage, too long, too many detours

                                     4, fans turning slowly, causing no negative pressure or vacuum is not enough air pressure switch is not closed

                                     5, the pressure transmission pipe is loose or missing pressure

                                     6, the controller connected wrong or bad
                                     So how do you deal with these problems?
                                     1, replace the ignition pulse

                                     2, the replacement of the air pressure switch

                                     3, clean up debris clogged pipe

                                     4, replace the motor or capacitor

                                     5, then a good pass pressure tube or encrypt does not leak until the pressure

                                     6, reconnect or replace the controller