Kitchen Gas Appliances - Burner Cycling Problem

I HAVE A RHEEM/HONEYWELL unit dated 02-09-90.Can't read any serial numbers but a wiring diagram has 90-22746-01 rev 03 Any way unit had problems after having roof replaced. Unit had to be lifted off and then replaced. Now as I stand looking inside with one of the covers off I here a clicking noise and the burners come on,about 5sec llater they go off and on and off etc. If I could get a trobleshooting manual I think I could do this.Unless of course you can help with limited info that I'm giving.I did check all the wires from unit to stat with a toner and a ohm meter.:( :confused:

Hello Grumpy_53. Welcome to my Gas Appliances topic & the Do-It-Yourself Web Site.

Excellent Question. Rare problem. May be difficult to resolve.
I'll offer you the rare possibilities since I doubt the problem may be within the unit if no problem with the unit existed prior.

When you mentioned the unit had to be lifted off, I assume you mean lifted off the roof. If this is correct, check to insure that the vent cap on the flue pipe is installed correctly.

Some units have a built in flue whiles others do not. The ones that do not have built in flues have the extended flue pipe slightly above and extending out of the unit. It will have a vent cap.

Those with built in flues have a vent hood similar to a dryers exhaust vent hood without a flapper valve.

A common problem often done by roofers. They or someone will push the vent cap down too far onto the flue pipe. In doing so the cap closes off the all or too much of the louvers on the cap.

When this happens the flue fumes cannot exist or exit fast enough, causing the safety device in the furnace to shut the unit down quickly.

Burners flames will smother and may also burn outwards from the front of the firebox and not inwards into the firebox. Outwards means the flames rollout backwards. Thus the phrase rollout. This happens when the flue is blocked or restricted for any reason.

Another possibility could be the power vent fan. If the unit has a power exhaust vent fan, in rare instances the burners will fireup briefly and shut down quickly, if some problem is present with the power venting system. Rare but have seen this happen.

If you need further assistance, use the REPLY button to add any additional information or ask additional questions after attempting any correctional method or methods offered.

Regards & Good Luck, Forum Host & Multiple Topic Moderator.
TCB4U2B2B Company Enterprises. Energy Conservation Consultant & Gas Appliance Diagnostics Technician.

Thank you for your help. I did look for a vent, both on the roof and in the attic. I guess because it is a forced air system there is no vent to speak of.

I will try to explain as well as I can, although I am not a knowledgeable heating A/C person as far as terminology goes. The problem that I am now having was one of the original problems I had after the roof was installed. Along with this was a fan that made a terrible noise (bearing gone, so I replaced the small fan.) I labeled the wires prior to disconnecting them and replaced the fan with exactly the same as the original. The fan is now quite. This fan sits above some kind of thermo low voltage switch. If I push the button on the switch the cycling begins. Then the switch gets hot and the button pops up. I don't know if it should go down when cooled off by low voltage or spring tension. Either way it does not but I don't think that is the problem. When buton is down I have 24vac on both sides, when poped up I have 24vac on the THC side? and 7vac on the PRC side I'm not sure the sequence that I should check in but I did find a Model #=RRGG-05E36JKR. If I can locate a service manual with voltages and troubleshooting process I may be OK. I know it is hard to help someone without having a good idea of the unit and the persons abilities. I am very good with electrial if I have the info to work with. Thanks for your help I do appreciate it.

Hello: Grumpy

Thanks for supplying additional information in your reply. You're explaining the problem description well. However, I am still inclined to believe the problem lies in the power venting system.
Therefore, I refer you back to my original reply.

Next, I cannot believe there is not vent on the furnace. Knowing now that the unit is installed insdie an attic, it has to or should have a vent pipe to the outside somewhere and somehow.

In all my years as a service rep, rarely have I found a furnace unvented to the outside when installed inside any enclosure. Codes do not allow for venting of fumes inside any enclosure any where in this country to the best of my knowledge.

Regarding the actual problem, the problem in my opinion & based upon the information provided resides within that venting system. The power venting fan draws air into the firebox and exhausts it out the vent or flue pipe.

If there is any failure to create a vacuum to draw air into the firebox {especially at the exists of the firebox which most likely are out of plain view} or exhaust it out, the exhaust fan may continue to run but the burners either will not lite or the burners will be shut off by a safety device.

Your referrence to that tiny button or switch may be the problem. It is a safety reset button doing what it is intended and designed to do. It may be defective or working properly.

The problem can be anywheres in the venting system or within the firebox. The power fan must obtain vacuum on the firebox side and pressure on the venting side. Failure on either side results in the problem you are decribing.

I do not have pictures, schematics or wiring diagrams to offer. Nor does our web site allow for the posting of such. Sorry.

Contact the local heating agent or a retail heating parts dealers for advice and possible solutions. I am totally out of ideas at this point but inclined to think the problems resides as stated.

Additional Suggestions:
Read the manufacturers web site for product information, problem possibilities, causes, solving methods, part locations, disassembly, reassembly, repair procedures, instructions, pictorials, schematics, all or part of which may be available online.

Regards & Best Of Luck, Forum Host & Multiple Topic Moderator.
TCB4U2B2B Company Enterprises. Energy Conservation Consultant & Gas Appliance Diagnostics Technician.

The heating A/C unit is on the roof its the sheet metel that goes from the unit into the attic and then the ducks expand to each room from that point. Any I turned the power off ,discharged all the caps,took the battery out of the thermostat untill the led went dead about 2min. hooked everything back up turned the power back on and it,s working now but I don't have a clue as to why.Locked up for whatever reason but it's working now and my wife is so much more pleasent now.Thanks for your help.I did try to get on the manufacture site but that page is down??.Any way thank you for your help.