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When heater fails to start - Heating & Cooling

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  • quackman Sep 24, 2008

    The heater goes through all of the checks but fails to light and then the blower comes on and blows cool air through the house. When checking at the gas vent on the heating system, was warm and cooled down aftr a short period of thime

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If the flue is warm that would indicate that the flames lit for a short while. furnaces sometimes have limit switches that shut down the gas if the heat exchanger gets too hot. I would verify you have clean filters. and all registars open fully.
If the flames are not lighting verify gas valve is recieving the 24vlts. to open.
Also check ignition system it will be a piolet light or hot surface ignitor. you should be able to see both without much trouble. hs ignitor should get bright cherry red.

Posted on Sep 24, 2008

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Posted on Jan 02, 2017

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Needdiagnosis on 02 toyota siena le 3.0 have problem codes p1135,po141


3.0L V6

Sienna
wild guess, the 1MZ engine?



141 fed code is. (it means B1S2 heater is bad,or wire to it cut or shorted.) below is fSM spec. worsd.





HO2S-12 (Bank 1 Sensor 2) Heater Circuit Malfunction








Number of Trips to Set Code: 2

Trouble Code Conditions:

Engine started, engine running, and the PCM detected the HO2S-12 heater current exceeded 2 amps, or that it was 0.25 amps or less.

Possible Causes:



  • * HO2S heater control circuit is open, shorted to ground or power


  • * HO2S heater power circuit is open (check power from the relay)


  • * HO2S heater is damaged or has failed


  • * PCM has failed



then the factory code p1135 same deal,same reasons B1S1





A/F Sensor-11 (Bank 1 Sensor 1) Heater Circuit Malfunction








Number of Trips to Set Code: 2

Trouble Code Conditions:

Engine started, engine running, and the PCM detected the A/F Sensor-11 (A/FS-11) heater current was less than 0.25A, or that it was more than 8.0A at anytime during the CCM test.

Possible Causes:



  • * A/F sensor heater circuit or ground circuit is open


  • * A/F sensor heater power circuit is open


  • * A/F sensor heater is damaged or has failed


  • * PCM has failed




bar stool answer.

both bank 1 senors (oxygen) are bad. if wires are good.



easy answer ,no?



the PCM never lies. the current IS ILLEGAL,(BAD)

the why takes , inspection and ohms checks , FSM shows this..



your next question is where is bank 1,

its on cylinder 1 side.

your next question is , where is cylinder 1,

it the cylinder that sticks out further to crank front pulley.



front 134

front 246

Feb 27, 2014 | Toyota Sienna Cars & Trucks

1 Answer

The fan has recently started running very loudly. It seems to be the fan behind the ice maker. It started getting louder about two weeks ago and has gotten even louder in the last day or two. Sounds...


It could be an ice buildup. A bad defrost heater or thermostat most likely. Remove the ice maker and back panel and look for ice. Typical failed defrost:
themobilian_2476.jpgthemobilian_2477.jpg
If you see ice like on the left then you have either a failed timer or defrost control OR a failed heater OR a failed heater termination thermostat commonly known in the appliance repair world as a terminator. The most popilar generic terminator is the 25f close and 50f open type, In other words when the ice box is below 25f the termination thermostat is open for business and will allow the heater to commence defrost when powered up by the timer or electronic control to do so. Since the defrost duration is 21 minutes long we need to shut down the heating element to prevent damage to the ice box. So what goes wrong? Look for a failed terminator or a failed defrost heater. If both are fine then the control will be the problema. If it is defrost timer simply advancing the timer forward manually can kick it into defrost and turning it manually several turns and sometimes frees it up, if it is electronic you will have to post a model number for further assistance.

Jun 21, 2011 | Refrigerators

1 Answer

2005 Dodge Cummins 2500 Will not start unless either is applied - Runs good after it does start


check grid heater selenoid make sure power goes true with key on
(power at grid heater) if no power replaced selenoide (special selenoide)
do not use any other then specified will not work for long 1 or 2 days and will fail shortly
if power reach gride heater disconect wire at grid heater check gride heater with
owm meter for ressistance if that fails replaced grid heater

Apr 02, 2011 | 2005 Dodge Ram Srt 10 Pickup

1 Answer

FRIDGE IS NOT AUTOMATICALLY DEFROSTING, PLEASE ADVISE WHY


When asking for help, you should include the brand and model number to help get a great answer.

The automatic defrost system has 3 parts. 1: Timer. 2: heater. 3: thermal switch

The timer will start the automatic defrost cycle every so many hours. If the timer fails, the defrost cycle will never start. The electrical schematics should be under or on the back of the refrigerator. You can use this to figure out how to test the timer.

The heater is what does the actual defrosting. If it is broken, it will not heat.

The thermal switch turns the heater off when enough ice has been melted. If this switch fails, it will prevent the heater from heating.

The heater and the thermal switch will be wired in series and their connections will be securely covered so you cannot test them independently. You can electrically test then together but you cannot decide which one is broken unless you expose or cut a wire. I have never seen a heater fail.

I see timers and thermal switches fail. Heaters don't fail very often.

The heater and thermal switch are in the freezer area and are very close to the evaporator. You will have to take apart enough of the freezer compartment to get to these parts. You will also need to melt enough ice to get to these parts.

Jan 14, 2011 | Whirlpool 21.0 cu. ft. Top Freezer...

1 Answer

The Kenmore 500 will not produce heat as it blows a fuse (30 amp. time delay) but continues to work..when stopped, it will not start again until the blown fuse is replaced and then the same thing over...


The heater has probably failed. When the heater fails, it usually breaks somewhere in the middle of the heater coil. Sometimes the broken coil can touch the heater housing which creates a short or partial short to ground.

Unplug the power cord. Test the heater for continuity with a meter. If the heater does not have continuity, it has failed and must be replaced.

Apr 06, 2010 | Kenmore 500 6952 Dryer

1 Answer

Oil-filled heater smelling


yeah they do that, time for a good cleaning, if that fails, I'd replace with a ceramic heater... they are cheaper safer and cost less to operate.

Feb 21, 2010 | DeLonghi TRD0715T Oil Filled Radiator...

1 Answer

My check engine light is on and I received code P1135, Manufacturer Control Fuel Air Metering is the defintion of the code. What parts do I need to get to fix problem myself?


Not sure where you got that definition for that code but this is what it is and means with possible causes for whichever motor you have:

Trouble Code: P1135 (2.4L L4 VIN - Auto)
A/F Sensor-11 (Bank 1 Sensor 1) Heater Circuit Malfunction Print this code dataprint_icon_codes.gif
Number of Trips to Set Code: 2
OBD II Monitor Type: CCM Details
Indicators: MIL Details
Trouble Code Conditions:
Engine started, engine running, and the PCM detected the A/F Sensor-11 (A/FS-11) heater current was less than 0.25A, or that it was more than 8.0A at anytime during the CCM test.

Possible Causes:
  • A/F sensor heater circuit or ground circuit is open
  • A/F sensor heater power circuit is open
  • A/F sensor heater is damaged or has failed
  • PCM has failed

2001 Toyota Highlander - I4 - P1135, P1155


Trouble Code: P1135 (3.0L V6 VIN - Auto)
A/F Sensor-11 (Bank 1 Sensor 1) Heater Circuit Malfunction Print this code dataprint_icon_codes.gif
Number of Trips to Set Code: 2
OBD II Monitor Type: CCM Details
Indicators: MIL Details
Trouble Code Conditions:
Engine started, engine running, and the PCM detected the A/F Sensor-11 (A/FS-11) heater current was less than 0.25A, or that it was more than 8.0A at anytime during the CCM test.

Possible Causes:
  • A/F sensor heater circuit or ground circuit is open
  • A/F sensor heater power circuit is open
  • A/F sensor heater is damaged or has failed
  • PCM has failed

2001 Toyota Highlander - V6 - P1135

Oct 21, 2009 | 2001 Toyota Highlander

2 Answers

Turning heater on : combustion air switch failed to close?


This air switch proves that the inducer motor is running and moving air. If not, check to make sure that the inducer motor starts and that the flue is free of restrictions.....eg. bird nest, ice/snow, or some other critter that found a new home.

Oct 03, 2009 | Coleman Propane Forced Air Heater...

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