Fault Code 14
IGNITION LOCKOUTÐThis fault indicates the system failed to ignite gas and prove flame in 4 attempts. Control will
STEP | ACTION | YES | NO | GO TO | |
1. | Turn power off and set thermostat to OFF position. Turn power back on and wait a few sec for self | Ð | Ð | 2 | |
test before proceeding to next step. | |||||
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2. | Does Fault Code 14 flash? | 3 | 6 | Ð | |
3. | There is a miswire or short to gas valve wiring. | Ð | Ð | 4 | |
4. | Fix problem. | Ð | Ð | 5 | |
5. | Go to page number indicated in Index for CLEANUP AND | Ð | Ð | INDEX | |
6. | Does a different fault occur? | 7 | 8 | Ð | |
7. | Go to page number indicated in Index for the fault code flashed. | Ð | Ð | INDEX | |
8. | Remove blower access panel and depress door switch. Use a piece of tape to hold switch closed. | Ð | Ð | 9 | |
9. | Jumper R and W/W1 thermostat terminals. | Ð | Ð | 10 | |
10. | Does Fault Code 14 start flashing when | 11 | 12 | Ð | |
11. | Replace furnace control board. | Ð | Ð | 5 | |
12. | Does a different fault occur? | 7 | 13 | Ð | |
13. | Disconnect jumper wire across R, and W/W1, 2 thermostat terminals and wait until blower stops.. | Ð | Ð | 14 | |
14. | Jumper R, W/W1, and W2 thermostat terminals on furnace control board. | Ð | Ð | 15 | |
15. | Does Fault Code 14 start flashing when | 16 | 17 | Ð | |
16. | The BLUE and GREEN wires to gas valve GV are reversed. | Ð | Ð | 4 | |
17. | Disconnect jumper wire across R, W/W1, and W2 thermostat terminals and wait until inducer stops. | Ð | Ð | 18 | |
18. | Put setup switch | Ð | Ð | 19 | |
| Is a Fault Code 34 present in fault history? |
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19. | NOTE: Read fault codes until they repeat. The last fault code that occurred will flash first fol- | 20 | 22 | Ð | |
| lowed by the lowest number fault code. (EXAMPLE: 14, 14, 34) |
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20. | Cycle furnace several times to check for intermittent operation. | Ð | Ð | 21 | |
21. | Check that the GREEN wire is properly connected to furnace sheet metal and clean flame sensor | Ð | Ð | 5 | |
withfine sandpaper. | |||||
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22. | Go to page number indicated in Index for CLEANUP AND |
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persists on an intermittent basis, replace furnace control board. If problem still persists on an inter- | Ð | Ð | INDEX | ||
| mittent basis after replacing furnace control board, contact your distributor. |
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Fault Code 21
INVALID MODEL SELECTIONÐPersonality connector PL5 is either not connected or jumpered wrong.
STEP | ACTION | YES | NO | GO TO |
1. | Turn power off and remove blower access panel. | Ð | Ð | 2 |
2. | Is personality connector PL5 properly wired per furnace model size chart on wiring diagram? | 5 | 3 | Ð |
3. | Replace or rewire personality connector. | Ð | Ð | 4 |
4. | Go to page number indicated in Index for CLEANUP AND | Ð | Ð | INDEX |
5. | Depress door switch. Use a piece of tape to hold switch closed. | Ð | Ð | 6 |
6. | Make sure thermostat is calling for heat or jumper R and W/W1 thermostat terminals. | Ð | Ð | 7 |
7. | Will furnace operate while flashing fault code? | 9 | 8 | Ð |
8. | Replace furnace control board. | Ð | Ð | 4 |
9. | Are personality plug wires making good connection? | 10 | 11 | Ð |
10. | The furnace will operate acceptably; however, a model selection circuit failure has occurred and fur- |
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nace control board is defaulting to last valid model selection. Board replacement is recommended | Ð | Ð | 4 | |
| but not necessary. This fault code will flash continuously. |
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11. | Fix poor terminal connection or replace personality connector. | Ð | Ð | 4 |
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