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Vulcan HC01 F 12 error on heater any ideas?

Control pad on ducted heater is flashing HC-01 F 12

Posted by gail on


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  • 1 Answer

SOURCE: I have a similar problem

I just went into the Bonaire website and downloaded their FAQ on gas ducted heating from their support link. Their instructions are pretty easy to understand.

Posted on Sep 09, 2009


Michael Youngman

  • 296 Answers

SOURCE: Is vulcan duct heater still in existence?

Yes. Vulcan heater company is still making heaters. Here is the link.

Grainger is a direct seller of Vulcan heaters, so you chould be able to give them a call, explain what you need or giver them a part number and they will be able to get what you need.

Posted on May 12, 2010



  • 1 Answer

SOURCE: we have a Vulcan Ultra high efficiency gas ducted heating

Gas ducted central heater won't switch on all of a sudden

Posted on Sep 21, 2010

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I have a Vulcan Ultra 21E ceiling ducted unit The LED flashing fault is no 8 which is a gas interruption. The unit fan runs, ignition starts full flame and gas flows for about 2 secs then shuts down The...

Just been thru a similar problem with my Climate Technologies Vulcan High Efficiency Ducted Gas heater which in this case is installed under the house. This heater is about 7 years old and I have previously (2 years back) refurbished the controller by replacing the main power supply electrolytic filter capacitors.

I also had a communication problem with the Touch pad Thermostat which in the end required replacing the entire touch pad as one of it's voltage regulators had gone intermittent (Touch pads are available on E-Bay). To operate the heater while the touch pad was out of commission I installed a manual switch between the heat contacts on the heater controller. Closing the switch causes the heater to permanently run if it has no thermostat. Once communication with the touch panel was restored we were able to try and find the intermittent heater fault.

Again I have been getting Fault Code 08 "Gas Interruption" however the heater was lighting OK and then going out after about a minute or so. In the end I found 2 distinct heater faults.

Fault 1 was the flame sensor where the weld between the wire and flame probe rod had broken but it was still touching. This meant it was sensing Flame OK and then later would go open with expansion as the temperature rose. I fixed this by replacing the Flame Probe with a new one sourced from Reece HVAC.

At this point I celebrated thinking it was fixed!

Fault 2 after the flame sensor issue was cleared the fault still persisted but slightly less often.
The heater was cycling 3 times to get going and then locking out, requiring a reset from the touch thermostat or heater controller board. Sometimes the heater would achieve a onging burn for a long period, and other times just locking out after 3 tries.

Careful observation of the flame, through the observation holes after it lit, showed correct flame sensing but as soon as the nominal 65C duct temperature was reached the combustion fan (modulates) throttles back too far and the flame goes out, the flame sensor switches off and gas valve is then closed. The pressure differential across the burner manafold controls the Gas flow rate so if the combustion fan goes too slow the flame goes out due to lack of gas.

On the control board there is a potentiometer marked "MIN GAS RATE" this needs to be tweaked clockwise until the burner remains lit when the nominal 60-65C duct temperature is reached. Don't turn it up too far or the heater may not throttle back enough and end up going out on overheat.

Once a stable flame is achieved when throttled, try the heater in the economy mode which uses a lower recirculating fan speed and check the flame still remains lit. My problem was most obvious in the Econ mode.

Hope this helps someone else - It took me over a year to solve this one. NeilP

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Bonaire Vulcan ducted heating system flashes F08 and HC 01. What do I do?

I was able to fix my Pyrox ducted gas heater (flashing between HC01 and F08 by pressing the reset button on the main PCB located in the main heating unit.
The reset button is located next to a set of indicator led's. It's easy to get to by just removing the covering shroud.

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I have a similar problem

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How do you change the heater core in a 2002 Dodge Intrepid?

  1. Disconnect the negative battery cable from the remote battery post located near the right strut tower.
    CAUTION After disconnecting the negative battery cable, wait 2 minutes for the driver-s/passenger-s air bag system capacitor to discharge before attempting to do any work around the steering column or instrument
    Remove the instrument panel by removing or disconnecting the following:
  2. NOTE On the LHS or 300M, remove the center bezel prior to the shifter bezel
    Shifter knob Allen screw Both instrument panel end covers Using a trim stick tool, gently pry upward on the shifter bezel; then, disconnect both wiring connectors and a light bulb socket connector; then, remove the socket.
  3. Remove the 2 lower instrument panel cover screws (outside end) and disconnect the deck lid release switch wiring connector. Pull the lower instrument panel cover rearward releasing the clips. Remove the cable-to-brake release handle. Pull the cover rearward and remove it.
  4. If equipped for 6 passengers, remove the lower floor bin.
  5. If equipped for 5 passengers, remove or disconnect the following items:

    Center bezel using the trim stick Heater/air conditioning housing assembly control switch and the traction control switch wiring harnesses Bezel from the vehicle Two left side console side cover screws, pull the cover outward and remove from the vehicle Lower glove box door; the 2 screws are located at the right console side cover, pull outward and remove it 2 bracket screws and the 2 inside the console bin; then, remove the console 2 center lower instrument panel nuts 4 steel reinforcement-to-lower instrument panel cover bottom bolts 16-way DLC from the reinforcement left floor duct/silencer pad screw and the pad Steering column shrouds Shift interlock cable at the ignition switch Column wiring The under column duct section Left panel air conditioning outlet duct The 4 brake pedal support bracket-to-column mounting bolts Lower the steering column Heater/air conditioning housing and the Air bag Control Module (ACM) harness connectors then, the 2 ground eyelets from the floor tunnel near the bulkhead Using a trim stick, carefully, pry out on the left and right A-pillar trim moldings and slide them rearward to remove them.
  6. Using a trim stick, carefully pry upward on the instrument panel top cover, and remove it.
  7. From both sides, remove the scuff plate screw. Using a trim stick, carefully, pry out the scuff plates and remove them.
  8. Remove or disconnect the following:

    3 right side cowl panel screws and the panel 3 left side cowl panel screws and the panel Remove the right side under dash silencer and pad 2 right side radio antenna and amplifier harness connectors Left side junction block and Body Control Module (BCM) harness connectors 8 instrument panel-to-chassis screws Pull the instrument panel rearward Instrument panel from the vehicle with the help of an assistant ischarge and recover the air conditioning system refrigerant.
  9. Drain the cooling system into a clean container for reuse.
  10. Place shop cloths in the interior to catch any excess coolant.
  11. Remove or disconnect the following:
    WARNING The air conditioning lubricant used in this system absorbs moisture readily. Do not leave any portion of the system open for any long period of time.

    Air cleaner hose and the air distribution duct Heater hoses-to-dash panel spring type fasteners and the heater hoses from the heater core. Plug the openings to prevent coolant spillage. Refrigerant lines-to-expansion valve nut and separate the refrigerant lines from the expansion valve. Plug the openings to prevent contamination. 3 heater/air conditioning housing assembly-to-chassis nuts from the engine compartment 2 defroster duct screws and the duct Heater/air conditioning housing assembly-to-dash panel nuts and screws 4 rear seat heat duct nuts and the duct Rear seat heat duct elbow push-pin fastener Electrical connector from the heater/air conditioning housing assembly Pull the heater/air conditioning housing assembly rearward and remove it from the vehicle 2 heater core-to-heater/air conditioning housing assembly screws Heater core from the heater/air conditioning housing assembly
contact me and i can tell you how to put it back together

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How many wires for the thermostat do you have? If you tell me I can help. The green flashing, instead of red, in my experience, means a thermostat problem.

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