Before it even stats it will repeatedly ignite at 30 second intervals for about 12 times before starting.Then the heater will start up and after about 1 minute will turn off again It will repeat this process until the temperature level of the thermostat has been reached. After the thermostat level has been reached it will blow cold air though the ducts.
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Re: Starts and stops repeatedly
I need more info!
Have you checked the diagnostic indicator?
Some possibilities are....
If the buner lights than rapidly goes out....You have a dirty flame sensor..... Remove the sensor with a 1/4" nutdriver. This sensor is located under the burners. It has "ONE" wire hooked to it. unplug the wire. pull ou the screw. Carefully remove the sensor. Clean it with a small piece of sandpaper. reintall. This should give you heat.
Pressure switch.....If the burner does not light. It can be a variety of problems. Check your flue pipe for obstructions.
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On the passenger side of the dash thereis a fuse block. Find the HVAC blower fuse. Start the car, turn on the blower, and check for power at that fuse. If power disappears when the blower stops than you have a bad ignition switch.
If the unit has a induced draft motor on it it then it shoul turn on first when stat is calling for heat. If it does so then in about 30-45 seconds the igniter whether hot surface or spark should try to light pilot. If this is not happening then you probably need to replace the igniter. Hope this helps. Thank you
Call the fire department. That puppy is gonna explode! Seriously the average time a flame stays on is 25 seconds. 12 minutes would cause a Chernobyl type meltdown. If the burner is lighting intermitantly that is the coils, feel the coils, the one that is hot is the intermitant one. This 4 wire t-stat could be wank,many have fallen in the past.
System operation System arms 5 seconds after switching ignition OFF. Switch ignition ON. Ensure clock LED illuminates for 3-5 seconds. If LED flashes rapidly at regular intervals for approximately 1 minute, then flashes at irregular intervals: Key code not recognised. Remove key and try again. Programming When System malfunction: LED illuminates for 1 minute, then flashes at irregular intervals. Key(s) added or replaced. NOTE: Replacement keys MUST have blue mark. Keys with red mark are NOT compatible with this system. How NOTE: Programming method using vehicle keys can be deactivated using diagnostic equipment. Obtain 2 programmed keys (A and B). Insert key A into ignition switch. Turn ignition switch to position II. Wait 1 second. Switch ignition OFF. Remove key A. Insert key B into ignition switch within 5 seconds. Turn ignition switch to position II. Wait 1 second. Switch ignition OFF. Remove key B. Within 10 seconds: Insert key to be programmed into ignition switch. Turn ignition switch to position II. Wait 4 seconds. Switch ignition OFF. Wait 5 seconds. Start engine. If engine does not start and clock LED flashes: Switch ignition ON. Wait at least 20 seconds. Switch ignition OFF. Repeat programming procedure. Repeat above procedure to program remaining keys. Keys can also be programmed using diagnostic equipment
The symptoms you describe make no sense at all but just connect the wires by color, R = red etc. leave the jumper between Rh and Rc, red goes to Rh, Blue would go to C. C = Common. If at any time you short Red to Common, damage can be done, usually a blown fuse or blown transformer. So unplug the furnace while doing your connections. By the way, the new t-stat you bought uses batteries and the blue wire should not be used. Good luck and comment back if you need more info.
you may need to replace the thermostat or the thermostat batteries if applicable. To replace the thermostat follow the instructions on the new thermostat. Make sure to set the thermostat to the gas setting(see instructions) this should cure your problem. Good Luck on the repairs
just bump the ignition without starting it let sit for 20 seconds oruntill you hear lift pump shut off then shut off ignition and repeat do it 2 or 3 times should start then cummins is a self priming system has been for years even in semi trucks