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Old 12-04-2009, 07:54 AM   #1
cliffw42
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I have a 2007 CF30SK that I have pulled for about 24,000 miles. Lots of mods.
My problem is with the central heat.
It has given me sporadic problems since the beginning. Sometimes it works, and sometimes it just blows cold air.
It hasn't been a big deal, since I have a couple of ceramic heaters, and a ventless blue flame space heater. However DW wants the central heat to work right.
I took it out and took it to a dealer. He said he ran it through it's cycles over a dozen times, and there wasn't anything wrong ($100 please). OK, I took it back, re-installed it, cut out several splices in the wiring that were wire nutted, and crimped in new wire. The heater seemed to run fine. Next time out, it worked great at first, until the middle of the first night, then stopped (stopped heating, continued to blow cold air). I recycled it several times over a period of the next couple of days, then just left it on. Well...in the middle of the night, it started working, and did fine until we got home (3 or 4 nights). Since we will be going out again for Christmas, I decided I would run it at least one time every day until then, just to be sure. Well, it got cold today, (35-40 degrees) so I went out and started it up. Cold air. I recycled it several times. Still cold. You can smell propane at the outside vent, and hear it trying to start, but not starting.
On impulse, I decided to turn on the gas to the water heater (we normally use AC for it). It started on the second cycle, ran great for about 15 seconds and quit. Then, after 15 seconds it started again, ran great and after about 30 seconds I could hear the pressure decreasing until it quit. 15 seconds later it fired off again, good pressure, then the pressure decreased again and it went out. This went on for 6 or 8 cycles, then it seemed to run OK (though it sounded like the pressure was low).
I tried the heater again...still cold air.
I switched the tanks (thought maybe I had gotten some bad propane). No help.
The only thing I can think of that I haven't tried is changing out the regulator.
Any ideas, before I buy a new regulator?
I will appreciate any thoughts.
Cliff




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Old 12-04-2009, 08:06 AM   #2
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From what you discribe it sounds like the pressure regulator.
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Old 12-04-2009, 08:11 AM   #3
cliffw42
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That's what I'm afraid of. Thanks for the input.

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Old 12-04-2009, 10:23 AM   #4
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I agree with Keith, it sounds like the regulator. What happens with the cook top burners, will they very in intensity/flame color? Turn on one at lowest possible setting and see what happens. There could also be an intermittent leak in the lines somewhere, the regulator is designed to shut off the flow of propane if the pressure drops too low. This is a safety measure against a sudden rupture during an accident.
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Old 12-04-2009, 10:43 AM   #5
cliffw42
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Dayle1,
I turned on all of the burners, and they seemed to be working fine.
Tomorrow, I'll try turning one on low and see what happens.
Thanks,
Cliff


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Old 12-04-2009, 11:20 AM   #6
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My guess is that it is the igniter. If you smell propane, I would assume you have gas. If you have gas, all you need is a source to light it. I would check for a loose connection in the ignition system.
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Old 12-04-2009, 11:26 AM   #7
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I would have thought that to (ignitor)but he said the water heater would not stay lit onpropane which made me think it might be the regulator.
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Old 12-04-2009, 12:36 PM   #8
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Cliff, you said the stove burners were working fine...what about the refrigerator on gas? Curious that the stove worked, yet it's after the WH and central heat on the main line.
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Old 12-04-2009, 03:29 PM   #9
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Cliff, I agree it sounds like a regulator problem. I replaced mine as well. I installed two propane pressure gauges (about $15.00 at Walmart). With these installed, I found the system would bleed off gas within 5-10 minutes of closing the valves on the tanks. I could also smell propane in the tank compartment. After the new regulator, my pressure will stay in the system for at least 24 hours before bleeding off once I turn off the tanks. This is now an inspection item before each trip.





I don't know where the gas bleeds out at but I assume it is at the appliances (although I never smell gas inside the rig).
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Old 12-05-2009, 06:10 AM   #10
cliffw42
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Well, I turned the burner on low, and it seemed to be OK.
The refrigerator started on gas OK.
My friend had a spare regulator, the same as mine, so I switched them out. Now the stove burners seem to burn higher (more pressure), and the water heater seems to be running correctly. The furnace, however, is still doing the same thing. I am going to recycle it a few more times to see if, maybe, there is some air in that branch of the line.
I, also, found plans on the Internet to build a manometer to make sure I have 11 inches pressure on the line. I guess I will try that next.
Thanks for the thoughts.
Cliff



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