Amana wont light-sometimes

[Bise]

I have an Amana Air Command High Efficency 90. Model # guc070x30a.
When it fails the igniter heats up 3 times to light the gas and then the blower kicks on with no fire and runs untill I notice and stop it. It had been happening about once a week, but its been happening more frequently lately (3 times last 48hrs.). I've been getting it going by turning the thermostat down (to shut the blower off) and then back up and it will USUALLY light right away. I've pulled the burners off and cleaned them, but I dont think I'm even getting gas the times it fails.
ANY help would be great.
Thanks

[mikee]

Bise,

Did you ever figure out the root cause of this and/or get it repaired? My same model furnace is exhibiting the same symptoms, except that it refuses to turn on.

I suspected it wasn't getting any gas after summoning the courage to determine if the gas was actually coming out from the nozzles by (insert 6 o' clock news worthy antics here). I then turned the gas valve (the one inside the furnace) back and forth a few times and gave a gentle tap on some of its components with a screwdriver handle. I cycled the power for 30 seconds, and it began working.

Perhaps it was a stuck gas valve? I suspect I'll being having it repaired this winter by a professional repair man when the holiday weekend rates are in effect.

Amana Service Manual (if i can't attach it)
Google: "guc070x30a service instructions"

It has the trouble codes the computer unit flashes, though you have to detach the lower door to see the model number of the control computer.


Perhaps Google will index these Amana Furnace Model numbers and help someone else:

GUC045B30A P9898401F
GUC070B30A P9898402F
GUC070B40A P9898403F
GUC090B35A P9898404F
GUC090B50A P9898405F
GUC115B50A P9898406F
GUC045B30B P1106901F
GUC070B30B P1106902F
GUC070B40B P1106903F
GUC090B35B P1106904F
GUC090B50B P1106905F
GUC115B50B P1106906F
GUC045B30C P1114301F
GUC070B30C P1114302F
GUC070B40C P1114303F
GUC090B35C P1114304F
GUC090B50C P1114305F
GUC115B50C P1114306F
GUC045C30C P1114307F
GUC070C30C P1114308F
GUC070C40C P1114309F
GUC090C35C P1114310F
GUC090C50C P1114311F
GUC115C50C P1114312F
GUC045X30A P1173601F
GUC070X30A P1173602F
GUC070X40A P1173603F
GUC090X35A P1173604F
GUC090X50A P1173605F
GUC115X50A P1173606F
GUC045X30B P1208701F
GUC070X30B P1208702F
GUC070X40B P1208703F
GUC090X35B P1208704F
GUC090X50B P1208705F
GUC115X50B P1208706F
GUC045X30B P1212901F
GUC070X30B P1212902F
GUC070X40B P1212903F
GUC090X35B P1212904F
GUC090X50B P1212905F
GUC115X50B P1212906F
GUC090X35BI P1209404F
GCC045B30A P9898501F
GCC070B30A P9898502F
GCC070B40A P9898503F
GCC090B40A P9898504F
GCC090B50A P9898505F
GCC115B50A P9898506F
GCC045B30B P1107001F
GCC070B30B P1107002F
GCC070B40B P1107003F
GCC090B40B P1107004F
GCC090B50B P1107005F
GCC115B50B P1107006F
GCC045C30C P1114407F
GCC070C30C P1114408F
GCC070C40C P1114409F
GCC090C40C P1114410F
GCC090C50C P1114411F
GCC115C50C P1114412F
GCC045C30C P1161801F
GCC070C30C P1161802F
GCC070C40C P1161803F
GCC090C40C P1161804F
GCC090C50C P1161805F
GCC115C50C P1161806F
GCC045X30A P1161807F
GCC070X30A P1161808F
GCC070X40A P1161809F
GCC090X40A P1161810F
GCC090X50A P1161811F
GCC115X50A P1161812F
GUD045B30A P1115001F
GUD070B30A P1115002F
GUD070B40A P1115003F
GUD090B35A P1115004F
GUD090B50A P1115005F
GUD115B50A P1115006F
GUD045C30A P1115007F
GUD070C30A P1115008F
GUD070C40A P1115009F
GUD090C35A P1115010F
GUD090C50A P1115011F
GUD115C50A P1115012F
MODEL M/N MODEL M/N MODEL M/N
GUD045C30A P1164501F
GUD070C30A P1164502F
GUD070C40A P1164503F
GUD090C35A P1164504F
GUD090C50A P1164505F
GUD115C50A P1164506F
GUD045X30A P1164507F
GUD070X30A P1164508F
GUD070X40A P1164509F
GUD090X35A P1164510F
GUD090X50A P1164511F
GUD115X50A P1164512F
GUD045X30B P1208001F
GUD070X30B P1208002F
GUD070X40B P1208003F
GUD090X35B P1208004F
GUD090X50B P1208005F
GUD115X50B P1208006F
GUD045X30B P1213101F
GUD070X30B P1213102F
GUD070X40B P1213103F
GUD090X35B P1213104F
GUD090X50B P1213105F
GUD115X50B P1213106F
GUX045B30A P1119801F
GUX070B30A P1119802F
GUX070B40A P1119803F
GUX090B35A P1119804F
GUX090B50A P1119805F
GUX115B50A P1119806F
GUX045B30A P1161701F
GUX070B30A P1161702F
GUX070B40A P1161703F
GUX090B35A P1161704F
GUX090B50A P1161705F
GUX115B50A P1161706F
GUX045X30A P1161707F
GUX070X30A P1161708F
GUX070X40A P1161709F
GUX090X35A P1161710F
GUX090X50A P1161711F
GUX115X50A P1161712F
GUX045X30B P1207801F
GUX070X30B P1207802F
GUX070X40B P1207803F
GUX090X35B P1207804F
GUX090X50B P1207805F
GUX115X50B P1207806F
GUX045X30B P1213001F
GUX070X30B P1213002F
GUX070X40B P1213003F
GUX090X35B P1213004F
GUX090X50B P1213005F
GUX115X50B P1213006F
GUX070X30BI P1209302F
GDC045X30B P1208101F
GDC070X30B P1208102F
GDC070X40B P1208103F
GDC090X40B P1208104F
GDC090X50B P1208105F
GDC115X50B P1208106F
GDC045X30B P1213201F
GDC070X30B P1213202F
GDC070X40B P1213203F
GDC090X40B P1213204F
GDC090X50B P1213205F
GDC115X50B P1213206F
GCD070X30B P1212802F
GCD090X40B P1212804F
GCD070X30B P1217602F
GCD090X40B P1217604F

[HayZee518]

the following link is to gas valves for your heater. you might check out the Amana site for any heat product recalls.
Gas Valves - Amana: American HVAC Parts

[Bise]

Mikee,
It was the valve.
The problem gradually got worse untill the furance wasnt relighting at all after I would shut it down. Not knowing what else to do, I took the handle of a screwdriver and tapped it on the valve that is controlled by the thermostat. The furnace light right up every time for the next couple days. Then it would be the same thing; wouldnt light unless you gave the valve a tap.
I went to the local heating and cooling repair guys and had a new valve in 5 days for $55 or so. I put the valve on myself, but didnt trust myself to take apart and clean the old gas valve.
I would take HayZee's advice and check for recalls too.
Luck to you.
bise