When the heater is initially turned on everything works okay. Then after a few minutes, I hear a click, see a bright flash on the underside of the heater, and the heat no longer comes on (even though the blower, etc. is still working). The heat never comes back on unless I turn the heater off for several minutes.
Sounds like the high limit switch on the heater is kicking off. The flash is the switch shutting off the heating element. The only way to reset it is to turn unit off for about 5 minutes. Possible problems are: 1.) Bad thermostat 2.) blower motor not turning fast enough which means motor is bad.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
multiple options: Thermostat broken. Do you hear it click when you turn the heat button up or down? if not, the thermostat will require replacement. If it clicks, that could be an indication that the heating element is broken. Does the fan work?
When resetting anything electronic, leave switched off for about 15 mins. The electronic boards store the memory of any failure or problem and switching off for only a few seconds or minutes will not reset the board. Turn off at the mains supply not the wall control.
SOUNDS LIKE A PRESSURE SWITCH MALFUNCTION OR A OBSTRUCTED FLUE EXHAUST. 2 FLASHES MEANS YOU ARE IN SYSTEM LOCKOUT. ATTEMPT TO START 3 TIMES THEN IN LOCKOUT MODE RIGHT? YOU WILL NEED TO TURN OFF AT T-STAT OR BREAKER TO RE-SET UNIT, OR WAIT 60 MINUTES & IT WILL DO IT AUTOMATICALLY. WHEN IT CALLS FOR HEAT THE DRAFT INDUCER MOTOR WILL COME ON, THIS WILL CREATE A VACCUM THAT OPENS THE PRESSURE SWITCH PROVING DRAFT INDUCER IS VENTING, THE VACCUM CREATED CAUSES THE PRESSURE SWITCH TO OPEN PROVIDING POWER TO THE IGNITION CONTROL. THIS IS WHERE YOUR PROBLEM IS ACCORDING TO YOUR DISCRIPTION. TRY TO DISCONNECT VACCUM LINE FROM DRAFT INDUCER MOTOR & SUCK ON IT WHILE LISTENING FOR A CLICKING SOUND AT PRESSURE SWITCH. IF YOU DON\'T HEAR THE CLICKING SOUND WHEN YOU DO THIS, THEN YOU NEED TO REPLACE THE PRESSURE SWITCH. IF YOU DO HEAR THE CLICKING SOUND THE PROBLEM IS WITH AN OBSTRUCTION IN THE FLUE VENTING. THIS IS SOMETIMES CAUSED BY DEBRIS GETTING LODGED IN THE PORT AT INDUCER MOTOR WHERE THE VACCUM LINE FROM PRESSURE SWITCH IS CONNECTED. TRY TO CLEAR OBSTRUCTION WITH COMPRESSED AIR OR A WIRE HANGER. THIS SHOULD FIX YOUR PROBLEM. GOOD LUCK. HOPE THIS WAS HELPFUL.
Assuming that particular thermostat has a common mercury switch, the wiring behind or just inside the unit may be causing a strong enough magnetic field to throw off the balance of the mercury (liquid metal). The same scenario could be caused by other wiring or devices near the thermostat. To test this theory, hold a compass as near as possible to the thermostat and wait it to come on automatically. If the needle moves when the switch engages, the magnetic field is strong enough the throw the balance off.
When tucking-in the wires for the thermostat, avoid winding the wires in a spiral or wrapping them around anything. An active current through wrapped or winding wires will create an electromagnetic field.
It sounds to me like your thermostat may be bad. I would check power incoming to t-stat then turn temp. setting up and down to see if it is switching on and off. If not then replace. If it does then I would check all wiring to gas valve and if power is shutting off to valve but burner continues then replace gas valve. Thank you.
Sounds like it could be a effiency function to warn you that the heat elements are on. Check your thermostat manual and see if you can turn this feature off. If this is not a feature then the thermostat may be wired wrong or something in the circuit may be trying to short out.
there isnt a pilot if it has jets , it has a Hot surface ignitor. you should see a glow and then the jets light , if its running for a few min it may be overheating, have you changed the filter recently? you should also have a flash code you can locate when the furnace shut off and is no longer doin what its supposed to look thru the bottom door peep hole and watch for a series of red flashes. if you remove the cover after retrieving the flash code there will be a chart on the inside of the cover that will tell you why the furnace is shutting off. by the way the model # you gave is for the A/C coil above the furnace, not the furnace.