Manuals / Thermo Products / Household Appliance / Furnace

Thermo Products CMC1-75DV3N, CMC1-50DV3N, CMC1-50D36N, CMC1-75D36N, CMA3-50D36N If Led Light Flashes

Models: CMC1-75DV3N CMA3-75D36N CMA3-50D36N CMC1-75D36N CMC1-50D36N CMC1-50DV3N

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IF LED LIGHT FLASHES:

All installations and services must be performed by qualified service personnel.

Yes

Yes

IF LED LIGHT FLASHES:

 

1 FLASH, THEN PAUSE

SYSTEM LOCKOUT

2 FLASHES, THEN PAUSE

PRESSURE SWITCH STUCK CLOSED

3 FLASHES, THEN PAUSE

PRESSURE SWITCH STUCK OPEN

4 FLASHES, THEN PAUSE

OPEN LIMIT SWITCH OR ROLLOUT SWITCH

6 FLASHES, THEN PAUSE

115 VOLT AC POWER REVERSED

7 FLASHES, THEN PAUSE

LOW FLAME SENSE SIGNAL

8 FLASHES, THEN PAUSE

CHECK IGNITOR OR IMPROPER GROUNDING

CONTINUOUS FLASHING

FLAME HAS BEEN SENSED WHEN

(NO PAUSE)

NO FLAME SHOULD BE PRESENT

 

(NO CALL FOR HEAT)

 

CHECK COMPLETE SYSTEM OUT.

THE LED WILL ALSO FLASH ONCE AT POWER-UP.

LED LIGHT STAYS ON CONTINUOUSLY,

COMPLETE FAILURE - REPLACE

INTEGRATED CONTROL.

TROUBLESHOOTING COMPLETE.

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Thermo Products CMC1-75DV3N, CMC1-50DV3N, CMC1-50D36N, CMC1-75D36N, CMA3-50D36N, CMA3-75D36N service manual If Led Light Flashes
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FAQ

Who should perform installations and services for Thermo Products furnaces?

All installations and services must be performed by qualified service personnel.

What does it mean if the LED light on my Thermo Products furnace flashes once at power-up?

The LED will flash once at power-up, indicating a complete failure. The integrated control needs to be replaced.

How can I troubleshoot pressure switch issues on my Thermo Products furnace?

If the LED light flashes 2 or 3 times, followed by a pause, it means the pressure switch is stuck closed or open. Follow the troubleshooting steps to address the issue.