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Rudd furnace molel robd-150rbja worked good for 5 years now takes 24 hours to raise house temperature from 60 to 70 degrees burner fires properly then fan starts properly after about 5 mineuts of bott running normally the both stop at once leaving unit very hot 10 to 15 min later they start again

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Get it looked at quick, before your exchangers crack, because the furnace not cooling them down after operation will lead to failure, and the replacement is not cheap, close to the cost of a new unit.

Posted on Dec 06, 2008

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Posted on Jan 02, 2017

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Where do I set thermostat when temp is 10 degrees outside?


Setting a thermostat has nothing to do with outdoor temperature, but more to do with what is a comfortable setting for you and your utility bill.

A common misconception associated with thermostats is that a furnace works harder than normal to warm the space back to a comfortable temperature after the thermostat has been set back, resulting in little or no savings. This misconception has been dispelled by years of research and numerous studies. The fuel required to reheat a building to a comfortable temperature is roughly equal to the fuel saved as the building drops to the lower temperature. You save fuel between the time that the temperature stabilizes at the lower level and the next time heat is needed. So, the longer your house remains at the lower temperature, the more energy you save.

Another misconception is that the higher you raise a thermostat, the more heat the furnace will put out, or that the house will warm up faster if the thermostat is raised higher. Furnaces put out the same amount of heat no matter how high the thermostat is set; the variable is how long it must stay on to reach the set temperature.

In the winter, significant savings can be obtained by manually or automatically reducing your thermostat's temperature setting for as little as four hours per day. These savings can be attributed to a building's heat loss in the winter, which depends greatly on the difference between the inside and outside temperatures. For example, if you set the temperature back on your thermostat for an entire night, your energy savings will be substantial. By turning your thermostat back 10 to 15 degrees for 8 hours, you can save about 5 to 15 percent a year on your heating bill -- a savings of as much as 1 percent for each degree if the setback period is eight hours long.
Hope this helps..........

Nov 23, 2010 | Goodman GMS90703BXA Heater

1 Answer

RHEEM OIL FURNACE MODEL ROBD 067 LBEA BLOWER


You will likely need to install an isolation relay in the W circuit from the thermostat. Some thermostats rob a small current through the W circuit to power the thermostat. This small current can be enough to start the fan circuit timer. You can test this by disconnecting W at the furnace and allowing the timer to shut down. If the fan shuts off with the W disconnected you can install a simple relay.

The relay coil will be connected to Common on one side and the W from the thermostat to the other. Then you will run a wire from R on the furnace to the relay and from the N.O. Contacts to the W terminal on the furnace. This will kill that signal that is starting the timer and the W can steal it's power through the coil back to common.


Dec 23, 2009 | Honeywell Electronic Programmable...

2 Answers

Lennox furnace 17 yeanrs old. flame comes on and the shuts down sometimes right away some times in a few minutes. We have the furnace go down to 58 at night. It takes all day to get back to 67.


Sounds like a dirty flame sensor.
Also 9 degrees is a large swing to recover. Most specialist will advise no more than a 5 degree set back, otherwise recovery time eliminates any savings you may achieve.

Dec 05, 2009 | Dayton (3E407) Heater

1 Answer

I have a Rudd forced air furnace that is 24 years old.The main burner comes on however the blower does not come on and then the main burner turns off.


Try to spin the blower to free it up. If it spins freely, you will need to replace the motor or you have a bad connection or a bad fan control.

Oct 18, 2009 | Honeywell Programmable Thermostat Heater

1 Answer

I recently bought a 4 ton 14.5 SEER Rudd Spilt system using R-410 and matching Rudd furnace. This system replaced a Lennox 10 SEER 4 ton unit. Now that it has gotten hot in Baton Rouge LA 90-93 degrees....


Sounds like the Unit might be low on charge.But without correct readings not sure.
The new unit with 410 will actually cool better due to higher boiling point temp. of freon type.Poor air circulation could also cause problem.Such as dirty filter, too slow fan speed,dirty coil.Also could have obstruction in freon lines either at pump,in line set,or in coil.
Get someone u trust to check it out and ask for their Rudd Dealership Training Credentials.

Jun 15, 2009 | Heating & Cooling

1 Answer

I have a comfort zone furnace. If it's 50 degrees in the house, and i set my thermostat to 70 or so,it takes at least 24 hours to reach 70 degrees. The furnace starts up and runs normally for about five...


When the thermostat calls for heat it should run until the room reaches the temperature setting then shut off. Is the blower motor running and can you feel air coming out of the vents? It sounds like the blower is either not running or putting out enough air to keep the furnace heating. The blower moves the heat from the heat exchanger to the room, if it can't remove enough heat from the heat exchanger there is a limit switch that will shut the burner off if it gets to hot and that's what it sounds like is happening.

Apr 25, 2009 | Heating & Cooling

1 Answer

Heat temperature issues with Goodman GMP 100-4 furnace


69,000 btuh is adequate for a 12-1400 square foot house.
Otherwise, your thermostat simply tells the furnace to cycle on/off.
If it calls for heat and does not come on, the problem is with switches and relays within the furnace.
Your setting the temp higher only causes the other parts to keep trying until they finally light and heat.
This is based on your information saying it will cycle on and blow cool air--not hot air.
You will have several temperature variations from floor to ceiling.
You probably have ceiling vents as well.
You need a technician to verify the rollout switches, fan relay, inducer fan etc. if the furnace is not firing everytime you call for heat.

Feb 21, 2009 | Goodman CPLE24-1 Air Conditioner

1 Answer

The burner lights for a few seconds and then shuts off


sounds like a bad limit switch in fire box or low airflow check air filter

Jan 04, 2009 | Ruud Handler Air Conditioner

1 Answer

Furnace rumbles when it turns on


varies from burner to burner to burner , should replace with the same as you removed , the numbers are very important on the nozzle one of the numbers is the degree of the fire pattern the nozzle produces ex. a 90 degree or 80 degree etc . this is determined by the way the fire box in the furnace is insulated . the other number is gallons per hour of oil the furnace is set up to use , ex. .70 gph or .80 gph all of these numbers are critical and should not be changed except by an expert or you could damage your furnace and could possibly be dangerous . the numbers will be on your old nozzle and should go back with same one , as to the adjustment , they also vary ,but i can give you one that will usually work for most furnaces , that is one eighth inch space between electrode tips , five eights in front of nozzle port opening , and one half inch above center of nozzle center , where the hole is . bleed all air out of system after installing nozzle , let me know if no fix have more ideas

Nov 21, 2008 | SySTOR Systems (400S52) Burner

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