Question about Heating & Cooling

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The heater starts normally when cold, but oonce it has been operating for a while, and has reached temperature and the flame stops, it will not relight when commanded.

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I see,, I believe you will have to replace the sensor that limit the temperature ..(thermostat) cause its damaged , and as I see it remains locked when the the temperature its high...after that its stuck cause the heat expends some metallic parts and cause its damages or plane rusty ...it doesn't came back into the original position to fire it up again once the temperature lowing down.......my advise is to replace the thermostat entirely ...and get rid of problems...cause it is the only responsible for starting and closing the heat.. ..might try to open it and clean it up ...if you tell me the model I will look for a blue print for your machine..
have a nice day!

Posted on Jul 15, 2009

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1 Answer

My 1997 Plymouth Voyager has air but the heat won't blow when switched on, only cold air.


Start your vehicle and let it reach normal operating temperature. Then, look for heater hoses that run into firewall. Carefully, grab both hose, they should be warm/hot. If only one is hot,could be clogged heater core, T-stat could be bad or mechanical component that allows warm coolant to run thru, is not working properly.
When you change setting inside, your heater and A/C panel, from cold to hot setting, do you hear anything ? There's a flap that opens and closes the coolant passage. This can be a mechanical or electronic operated component.

Nov 04, 2016 | Plymouth Cars & Trucks

Tip

Scania Fault Codes


000 00 No Fault
01 001 less than the rated voltage - heater works
02 002 higher than the rated voltage - heater works
004 03 Short circuit fan (D2I)
005 05 Short-circuiting the wires from alarm (D2I)
009 09 Heater off system TRS (D2I / D9W)
010 0A higher than the nominal voltage (heater stopped)
011 0B voltage less than the nominal (heater stopped)
012 0C overheat - fuel pump is turned off
013 0D temperature sensor recorded a high temperature
014 0E big difference values of t. Dutch. overheating and Dutch. regulation. t (D3W / D9W)
015 0F heater overheated many times - the heater is turned off (D2I / D9W)
017 11 Reusable overheating (t exceeds the second threshold) (D3W)
020 14 Candle / rod defective bulbs
021 15 Short candles / kernel bulbs
022 16 switch faulty lights / lamps kernel (D2W)
023 17 Internal defect relay control R2 candle / bar bulbs
024 18 Short-circuit switch controller candle / bar bulbs
025 19 Short-circuit diagnostic socket
029 1D fan air gap 5 does not operate R3
030 1E air fan does not work in all positions (R3-D3W)
031 1F air fan does not work in all positions (R3-D3W)
032 20 Air fan does not work in all positions (R3-D3W)
033 21 Air fan does not work in all positions (R4-D2I / D9W)
034 22 No contact with solenoid valve system COOL. (D2W / D9W)
035 23 No contact with the relay average performance
036 24 Short-circuit relay average performance
037 25 Do not rotate water pump (D2W / D9W)
038 26 No contact with the fan relay cab heating (D2W / D9W)
039 27 Short cab heating fan relay (D2W / D9W)
040 28 Short electromagnetic. COOLING valve system. (D2W / D9W)
042 2A Short circuit water pump (D9W)
043 2B Short cable from the computer to the heater fuel pump (D9W)
047 2F Short circuit of the fuel pump
048 30 No contact with the fuel pump
050 32 Heater run many times but have not worked (relay R3)
051 33 Flames emerged immediately after pressing the start button heater
052 34 No start (restart purge)
053 35 Stop flame during startup
36 054 Stop flame position max. productivity
055 37 Stop the flame in a position average performance
056 38 Stop the flame in the position of poor performance
057 39 Flame sensor short circuit (photoresist)
058 3A heater is turned off, but the flame in the combustion chamber (D2W)
059 3B Water temperature rising too quickly (D9W)
060 3C No contact with the sensor temperature control
061 3D sensor short circuit temperature control
062 3E No contact with the potentiometer (D2H / D2I)
3F 063 Short potentiometer (D2H / D2I)
064 40 No contact with flame sensor
065 41 Flame sensor short circuit
071 47 No contact with the sensor overheating (D3W / D9W)
072 48 Short-circuit overheating sensor (D3W / D9W)
073 49 Overheating sensor recorded the fastest increase in temperature (D9W)
090 5A Spontaneous error
091 5B high surge (high-voltage wires, CB-radio, etc.)
092 5C Faulty heater control unit - fault ROM
093 5D Faulty heater control unit - faulty RAM
094 5E Faulty heater control unit - fault EEPROM
096 60 Temperature sensor faulty heater ECU (D2I)
097 61 Faulty heater ECU (D2I / D2W / D9W)
255 FF cleared but faulty memory EEPROM

source
http://truckmanual.weebly.com/scania-fault-codes.html

on Dec 20, 2016 | Cars & Trucks

1 Answer

Fan on gas wall heater shuts off and on every 3 minutes, but the flame is on the entire time.


It always helps to add the model number of the item you want help on. However if it's like the newer units, the fan operates whenever the heater wall has reached a high enough temperature and shuts off when the heater cools off. It is not wired into your thermostat or electrically wired to the heater. It does that with a temperature driven fan switch in a little junction box mounted to the heater. Normally when that box gets hot because the heater is on the fan comes on, when it cools off the fan goes off. The junction box will have an ac cord coming out of it. If this fan switch junction box is not properly mounted it could be getting cooled off when the fan starts and then shuts itself off. After it heats up again it starts the fan. The other possibility is the temperature based fan switch is failing and needs replacement. See link.

http://www.cozyheaters.com/graphics/products/manuals_installation/CDV.pdf

Feb 22, 2015 | Cozy Heating & Cooling

2 Answers

Water only stays hot for about 5 min or


Gas or electric?
Electric water heater ... then test for crossover, check for water leak, replace thermostats, test elements
Gas water heater ... test for crossover, check for water leak
http://waterheatertimer.org/Crossover.html

http://waterheatertimer.org/How-to-replace-thermostat-on-electric-water-heater.html


http://waterheatertimer.org/How-to-test-water-heater-element.html

water leak: turn off all taps and put ear against pipe and listen for water leak... check if water meter advances when all water taps are off.

Gene

Oct 09, 2014 | Water Heaters

1 Answer

Heat stopped working


There are several possible reasons as to why you are not getting any heat in your vehicle. 1) Low coolant level; check coolant level in radiator/reservoir to make sure that it is within operating range (check with engine cold). 2) Improperly operating thermostat. If your thermostat is stuck in the open position, the engine will not reach operating temperature and the engine coolant will provide little or no heat to the car heater. Check your coolant temperature gauge on the dash to make sure that it is the normal operating range. The thermostat will need replacing if the engine temperature is still in the low range after 10 minutes, or so, of running. 3) Plugged heater core. After engine has warmed up, place your hands on the two smaller coolant hoses that lead into the firewall/heater. Both hoses should be hot (the inlet slightly hotter than the outlet) If one hose is hot and the other is only warm or cold, than the heater core is likely plugged. I would recommend a cooling system flush in this case. 4) The heater control valve is not open. The heater control valve is a valve located in one of the smaller coolant hoses leading to the firewall/heater core. It is usually cable operated, but may also be operated by a vacuum motor. Make sure valve is moving when the temperature lever or knob on your instrument panel is moved from cold to hot. If it does not move, and it is cable actuated, ensure that cable is connected to the valve arm and dash control lever. If it is vacuum controlled check small vacuum hose for kinks and leaks. Remove vacuum hose from valve and check for vacuum when heater control is moved from cold to hot. If vacuum is not present, there is a problem with the heater control (possibly a vacuum leak under the instrument panel or at the temperature control).

Feb 13, 2014 | TechShade - M923 Truck Parts & Accessories

1 Answer

Once the heater reaches the set temperature at the thermostat it shuts off.the flame goes out but the pilot light stays on. the heater will not kick back on automaticaly when it gets cold however it will...


you will have to look into why the unit is tripping and needs resetting. Heaters usually have a fan delay, meaning that when the heat is satisfied, the fan continues to run for about an minute. If not, it could cause an overheating issue and trip a safety. Look for that to start with.

Aug 05, 2017 | Williams 3003622 Ceramic Wall Mounted...

1 Answer

Heater donot get hot whil running


It could be a plugged heater core or heater control problem. I assume the blower is working, but the air is cold. The first thing to check is the coolant level, make sure there is coolant in the resivoir. Next see if the temerature gauge reaches the normal operating temperature range. If the gauge reads cold most of the time, it would tell you that the thermsotat is faulty and not allowing the engine to reach full operating temperature. If your car doesn't have a temp gauge, the blue cold engine light might stay on for an extended period of time. The thermostat is supposed to not allow coolant flow in the radiator until the engine reaches operating temperature. If you drive the car for a couple of minutes, from cold start, the radiator or upper hose should be cool until the engine reaches operating temp.

Mar 15, 2011 | 2003 Volkswagen Beetle TDI

1 Answer

Heater is cold


If your engine reaches normal operating temperature then it sounds like the heater valve is not operating. Find the valve on the engine firewall passenger side and manually open the valve. Find it by following the 3/4 inch heater hose to the firewall where it is connected to the valve. Most likely the cable ( or vaccum hose)from the temperature dial to the valve needs replacing.

Dec 31, 2009 | 1996 Buick Regal Olympic Gold

1 Answer

Rinnai freestanding Royale ETR flame fire (mains gas): All of a sudden my heater cuts out when it reaches the set temperature and I cannot work out why. I have the ''Auto Off'' turned off. I cannot work...


I had the same problem with this unit and had the heater serviced which fixed the problem. The problem is caused by the pilot flame not being big enough to keep the thermocouple hot, so the heater thinks the flame is out and it turns the gas off! The thermocouple is effectively a switch that is on when hot and off when cold. The pilot flame is supposed to keep it hot, so its on and the main burner will get gas. When its off (ie cold) gas is blocked from the main burner for safety reasons! This manual is for a very similar heater: http://www.rinnaisales.co.nz/tradesmart/rinnai2/pdfs/service_info/171.pdf

You need to get at the pilot and clean it out!

David

May 11, 2009 | Heating & Cooling

1 Answer

Heil heater starts/stops before reaching temp


is installed in a vertical up flow or horizontal position , if in horz position you could have a bad or miss positioned roll out switch this is a thermal switch positioned toward the burner edge that if the flame rolls out of burner area trips and then resets as it cools allowing the furnace to re-start until it reaches temperature , something to check .

Dec 08, 2008 | Water Heaters

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