Furnace that won’t fire, and a useful tip

Alright, on this one we are, oh we got no light. He said the furnace just clicks. Let's see what kind of igniter we have. This igniter said this thing just clicks. These are going to be my wires to my hot surface igniter. The switch is showing, I don't know if you can see that, shows 24 volts across it. Closed. Let's see if our hot surface igniter lights up. I found this. i replaced that negative pressure hose and the thing fired right off i'm about to show you the condenser outside i checked it in cooling while i was there you don't see a 36 year old air conditioner see that 1985 something related to that last video i wanted to show you guys those um negative pressure switch hoses can be hard to find and if you look at this the one on the left is a negative pressure switch hose and the one on the right if you look at the inside diameter it's exactly the same that is a fuel hose for one of those vintage Volkswagen Beetles been using it for some time now and they work fine these are these hoses are kind of hard to find but this works great so and you can order them in 10-foot sections