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jspin77 · Nov 2, 2008, 08:50 AM

I have a Goodman gas furnace that is about 3 years old. We turned it on for the fall a few weeks ago and it was working just fine. Recently one morning I realized that the blower had been on for a couple hours and I was still cold.

All the basic things have been checked. The system is set to heat, auto. No circuits are flipped (obviously.. the blower is working).

I opened the system up and first vacuumed it all out (although it was fairly clean in there). I then pushed in that switch so I could see a cycle run. Nothing too exciting there... the blower came on and a red light labeled DS1 came on. After a few seconds that light started blinking. Its on a main circuit board (the only one in there really). That was about it blower keeps blowing nothing else happens.

So I happen to have dual zone heating and decided to look at my downstairs furnace to see what it does. That is way more exciting. Blower comes on, DS1 light comes on, ignitor turns bright red and then the gas lights and lots of blue flames :)...

So I have determined that for some reason my ignitor is not turning on. Rather than replacing it, I am wondering what the DS1 light is trying to tell me. Does anyone know?

jspin77 · Nov 2, 2008, 09:15 AM

Ok, some more details after looking at my manual. The light is blinking 3 times which according to my manual means it's a pressure switch.

So now my question is will replacing my pressure switch fix the problem! Hopefully.

hvac1000 · Nov 2, 2008, 10:11 AM

First look at the tube that connects to the pressure switch. It might be cracked or have a hole in it. This will cause the switch not to work. Next if the hose is OK then follow the manual blink cycle repair diag.

jspin77 · Nov 2, 2008, 10:32 AM

Ok, I decided to switch the switch out with my downstairs unit. It still doesn't work. The hose looks good to me. The other end of it is glued on so I am not too keen on cutting it off? Is that my next step?

So I was reading a post somewhere else...
"blockage in either the intake or the exhaust pipes. The easiest way to check for this is to undo the coupler on the intake pipe inside the furnace housing and let it draw in air from the furnace room for a couple of minutes and see if that is a fix"

But I am not sure where those places are :) Do you have a better description? Is that guy making sense?

hvac1000 · Nov 2, 2008, 10:39 AM

Blockage in the pipe is a possibility but usually the pressure switch needs to be replaced.

The pvc pipe is glued but there is a connector on the furnace that usually a screw driver will disconnect. If you choose to disconnect the pipe so be it.

jspin77 · Nov 2, 2008, 11:09 AM

But I switched out the pressure switch and it still didn't work... my previous post was saying that. I have an identical unit downstairs and since its working fine, I swapped the pressure switches and it didn't help.

hvac1000 · Nov 2, 2008, 12:37 PM

Originally Posted by jspin77

But I switched out the pressure switch and it still didnt work... my previous post was saying that. I have an identical unit downstairs and since its working fine, I swapped the pressure switches and it didnt help.

What is the exact model of your unit. I want to confirm the sysytem you have.

Did you say that on the unit that was not running the ignitor did not light?

I would also like to mention that the parts should be under warranty.

jspin77 · Nov 2, 2008, 04:26 PM

Its actually working now. I ended up cutting the hose where it met the blower. The hose was fine but the metal piece that is connected to the blower was completely blocked. Once I unclogged it, the furnace started working fine.

hvac1000 · Nov 2, 2008, 04:48 PM

Usually that goes along with checking the hose or tube. If you cannot blow through them there is a problem.
Glad you got it going.