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I have a Rheem Criterion furnace. It will heat up and run at

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I have a Rheem Criterion...
I have a Rheem Criterion furnace. It will heat up and run at full heat for 5-6 minutes, then shut down. Then, once complete, it will again start up, run for 5-6 minutes... It will do this until the house is up to temp. Have replaced the filter...
JA: Sometimes HVAC issues that that you think will be really complicated end up being easy to fix. The HVAC Technician I'm going to connect you with knows all the tricks and shortcuts. Is there anything else the HVAC Technician should be aware of?
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Submitted: 1 year ago.Category: HVAC
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Answered in 1 minute by:
3/15/2016
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago
Rick
Rick, HVAC Supervisor
Category: HVAC
Satisfied Customers: 22,631
Experience: 40+ yrs. experience as a licensed oil & gas technician.
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I need the model number of your unit. It's on the rating tag inside the burner compartment

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Customer reply replied 1 year ago
RGDG-15EARJR
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

Give me a few to pull the specs for your unit.

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HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

How long does it shut down before it starts up again?

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Customer reply replied 1 year ago
less than 1 min. Almost automatically after the blower has run for a bit to disperse the heat
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

Could be a bad connection possible a bad ground. One possible source of a bad connection is the thermostat or thermostat wiring. If you want to try some troubleshooting try jumping the R & W terminals on the thermostat terminal strip in the furnace.

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Customer reply replied 1 year ago
by jumping you mean run a wire between r and w?
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

Yes

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Customer reply replied 1 year ago
Give me a moment. I should keep the wires connected to those intact, right?
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

You can leave the leads connected or not it doesn't matter. Also make sure you ave a good ground from the board to the junction box where the line voltage (ground) is connected to the unit.

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Customer reply replied 1 year ago
Ok, have jumped the r and w. Restart?
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

Yes restart it. Be sure the blower door panel is properly in place or it won't run

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Customer reply replied 1 year ago
Ok. Starter blower turned on. We'll see how long it runs. Shouldn't it run until the house gets up to temp set at thermostat?
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

Yes it should run until the thermostat is satisfied

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Customer reply replied 1 year ago
Ok, burners are running....we'll see how long...Started at 3:07
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

ok

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Customer reply replied 1 year ago
Curious. What does the jumping of R and W do?
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

Bypasses the thermostat and thermostat wiring

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Customer reply replied 1 year ago
how will it now when it reaches temp?
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

If it runs for longer than it did before (you said ~5 minutes) then we can assume a problem with the thermostat or stat wiring

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Customer reply replied 1 year ago
Just shut off. 3:13
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

Ok so not the thermostat. It gets more difficult to diagnose from here. Let it run and watch the amber /yellow LED on the board. Does it flicker or go out when the burner drops out?

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Customer reply replied 1 year ago
i only see two green
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

You have no yellow LED?

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Customer reply replied 1 year ago
no just two green
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

Is one designated FLAME?

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HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

If so then that's the one to watch

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HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

If it's running then wait until it shuts down to check

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Customer reply replied 1 year ago
One is labled "OK" one is labeled "PWR"
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

There are 2 versions of this board according to my specs. The one that has OK & PWR also has FLAME. The one that has 2 LEDS is labeled OK & FLAME. Let's see what happens when it shuts down.

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Customer reply replied 1 year ago
When it shuts down, then the lights go off after the blower turns off
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

Both lights go out?

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Customer reply replied 1 year ago
when all is shut down
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

Do you have a multi-meter?

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Customer reply replied 1 year ago
Sorry no. Perhaps it is time to get someone out to look at it. It does heat the house, just does the on/off thing so it takes a while
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

The PWR LED should not go out as long as there is power to the unit. So either the power is dropping out or you have a bad board.

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Customer reply replied 1 year ago
Thanks. I'll start there with the tech
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

You're welcome

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HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

I'd appreciate a favorable rating

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Customer reply replied 1 year ago
Do you have the board number in case I were to replace it?
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

Here's the parts list Attached.you need to refer to your serial number for the right one. Since I don't know the age of your unit I'll also upload the other list in a minute

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HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

Here's the other one

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Rick
Rick, HVAC Supervisor
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Experience: 40+ yrs. experience as a licensed oil & gas technician.

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