I whave a weathermaker sxi and the problem is the furnace will not start at all it when I power it up I get a green light for 15 sec and then a yellow light and then they both go out and then nothing the stat is set for heat is there a reset button in this furnace

Do the lights blink after the initial power-up? The unit has a lot of self-diagnostic capability, and if the lights aren't blinking after a minute or so, the trouble may be in the thermostat. Try this: turn off power to system, disconnect "R" and "W" wires from thermostat and connect them together, and power system back up. Does the heating operate this way? If so, replace thermostat.

The stat is fine it was checked with a ohm meter

When powered up the green light comes on for 15 to 39 secs and then the yellowlight turns on and then they both shut off at the same time and nothing starts

Do the lights blink after the initial power-up? The unit has a lot of self-diagnostic capability, and if the lights aren't blinking after a minute or so, the trouble may be in the thermostat. Try this: turn off power to system, disconnect "R" and "W" wires from thermostat and connect them together, and power system back up. Does the heating operate this way? If so, replace thermostat.Did you try this? Also check the low voltage wiring connections at the furnace control board. Do you have a condensate pump? Check for an overfilled reservoir and/or overflow switch circuit activated.

Checked the wiring conections seem to be fine reservoir is OK the ser# is 58sxbo60cc

I know you ohmed the thermostat, but DID YOU JUMPER R-W? The reservoir is OK... ok, pour some water into the pump to assure it is working. It doesn't have to actually overflow to activate cut-off circuit. No offense, but I sense some "assumptions" on your part.

I took a wire and so called hot wired the furnace so the r & w are hooked together with a wire at the furnace I will try the water trick in a bit

I took the board off the furnace and checked the water res it has no water in it

Did you observe the status lights long enough for a fault display to develop? Something truly unusual is going on here...

The status lights do not develop when I power it up the green light lights up for about 30 secs and then when the green light is on the yellow one lights up for a sec and then they both go out. This unit does not have a pump nor does it have an overflow cutoff the only thing that there is on the bottem of the burner there is a 1/2 inch hose that goes to the resivwar and a3/8 inch hose that goes to the exaust that is above and a 1/4 hose that goes to the back of 2 round switches that are obout 3 inches across. The resivwar has no wires leading to it

Did you wire R and W together at the furnace or the thermosat?

Yes

Now when I power the unit up I get the green light and then the yellow one then both off but if I unplug the rectangle shaped plug has a lot of wires on it the furnace will do a code of 33 and the fan will run