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Vulcan quasar 40 shut down when fan starts up

Gas burner operates fine up until fan starts then the whole unit shuts down

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  • Anonymous Mar 18, 2014

    The pilot ignites ok, the fan comes in as it should, the unit runs for around 7 minutes and then shuts down and pilot goes out.

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Replace the fan thermal switch located at the top of the heat exchanger. Unplug the power first as the switch is 240V.
Available from any plumbing trade shops e.g. Reece & Tradelink

Posted on Jul 18, 2009

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My adp cuhn-60a-2 sparks an lights burner ok, burns for only few seconds an shuts down burner, repeats this three times an whole unit shuts down?


You are describing the typical issue for a problem in the 'flame rectification' circuit. Turn the powere off. Find the flame sensor, it will be on the opposite side of the furnace from the spark ignition device. Carefully remove the sensor and clean with fine sandpaper, then clean the wire connector on the end of it if so equipped, then follow that wire all the way to the circuit board, remove the wire connection and clean it and reinstall. Many times that solves the issue.

Some systems utilize the spark ignition electrode as its own flame sensor. IF there is no separate flame sensor, perform the above task on the ignition device instead. Be careful NOT to bend the probe, crack the ceramic insulator or reinstall it malaligned. Its location in the pilot flame is critical. Slight relocation by improper handling will render it unable to ignite the pilot gas.

There may be another issue as there are many things that cause ignition lockout, but this is the first thing to do to eliminate the situation you've described.

If you are unsure of performing this and ANY minor maintenance to a gas fired appliance, abandon the idea and call a qualified service tech to proceed.

Dec 29, 2014 | Heating & Cooling

1 Answer

The fryer burners and pilot works fine but when I try to turn it off by the thermostat the fires go down a little but won't cut off, what could cause this


Likely one of two things. The thermostat is stuck on or your gas valve is bad. Identify one of the wires going to the thermostat and disconnect it, if the burners shut off with the thermostat disconnected the problem is the thermostat, otherwise it will be the gas valve. All this assumes the unit is wired correctly and has not been changed. If your burners are not shutting off due to a bad gas valve or thermostat you are at risk to have a fire! Be sure to get this fixed immediately and it is unsafe to operate the fryer until repaired.

Mar 20, 2013 | Frymaster Dean Kitchen Appliances - Others

2 Answers

Carrier gas furnace does not cycle right.


Check out the flame sensor see if it is clean and check the connections .

May 21, 2017 | Carrier Heating & Cooling

1 Answer

GAS Dryer starts and then stops after a minute or less.


Hi and welcome to FixYa. I am Kelly.

Most of the time when the symptom you describe occurs the flame sensor has failed. It does not sense a flame and as a by design fail safe shut off the gas safety valve.

However... if the burner never does light then there is another fail safe in that being an automatic shut off of the dryer when the burner does not light at all on units with electronic timer controls.

A weak gas valve coil can also cause an early shut down. I.e they are powered, open the gas valve but, can't keep it open.

If there is no airflow... i.e the blower fan hub has failed and it is not turning the burner flame will cause the high limit thermostat to trip. After about 5 minutes you would be able to restart the dryer only to have the whole evolution repeat.

You did not mention a make or model number so it is difficult to go into details on exactly what to do to rectify your dryers' shutting down problem.

Thanks for using FixYa,

Kelly

Apr 30, 2010 | Dryers

1 Answer

Panasonic air conditioning model no cu-v9ckp5 inside unit switches on but no fan operation outside unit starts then after approx 1 min whole thing shuts down again


The outside unit has a fan capacitor and it must be faulty!!! thae capacitor tells the fan to rotate and if the fan does not work then the compressor will shut down due to a high head pressure and temperture!! change the capacitor located in the electrical section of the outside unit and it should work fine...

Sep 10, 2009 | Heating & Cooling

1 Answer

No ignition and E04 Code


The HSI (ignitor) has 2 wires, its like a cigeratte lighter, power is applied and it heats then glows red, the single wire you mention is the flame sensor, used by the control board (igntion module) to ensure the burner has lit or it shuts the power to the gas valve off but keeps the fan operating for a period of 1 hour till it resets.

It sounds like your ignitor is defective, it happens often, depending on your location, you may be able to purchase one, but I would advise having a service tech do it.

The manual for troubleshooting and repair can be found at this link:

http://www.staritepool.com/pdfs/MiniMaxNTServiceManual.pdf

Aug 14, 2009 | Pentair MINIMAX NT TSI IGNITER

1 Answer

Burners shut down at set temp but fan continues lowering temp


the reason he told you not to cycle the power is because some where there is a flashing light that he can decode and tell him where to start looking for the problem. Call him next it happens and don't touch the power or the stat until he gets to see the unit.

Aug 03, 2009 | Heating & Cooling

1 Answer

Dometic rv fridge runs fine on elec, lights on gas but in one min shuts down. Dometic RV S1621 fridge runs fine with elec, when start gas operation. The burner runs for about 30 seconds then shuts off....


It is key that all control switches are in the correct position, depending on what power source you are using, gas, electric, etc. If the switches are not in the proper setting, the unit will not operate.

Here's the manual for your fridge that should be printed out for your use and reference (and reading enjoyment). It has all the info needed to operate and troubleshoot it.

Typically, when using any gas appliance with a pilot light, the sensor has to first be hot enough to trigger it to allow the safety gas shutoff to open and allow the gas to flow to the pilot/burner. Follow the instructions and you should be all set.

http://gasrefrigeration.net/dom_techdata/2707_2811SM.PDF

Hope you find this helpful and best regards!

May 03, 2009 | Dometic RM2193 Compact Refrigerator With...

1 Answer

Rheem gas furnace pilot lights, but no burners or fan


If the burners do not fully ignite, the sensor will shut the furnace down. The lack of sufficient burner flame is a gas valve or gas pressure problem within the valve.
Replacing the gas valve with the original one may get you going. I surely suggest a professional service company for safety reasons and a thorough inspection. A 20 year old furnace is past it's normal life span.

Jan 06, 2009 | Heating & Cooling

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