Carrier burners don't ignite

I have a 1986 Carrier Upflow Gas-Fired Natural-Draft Furnace, Model number 58GP050-BA Series 100. Some other notes is that I have a White Rodgers Digital Comfort Set II thermostat, a Honeywell Model VR 800A gas valve, and it is a match-lit pilot with natural gas.

When the thermostat calls for heat the blower turns on but the burners never ignite resulting in cool air being recycled thru the condo. Sometimes after about 10-15 minutes the aux light on the thermo turns on and then the burners ignite.

I do not get 24v to the gas valve until the aux kicks on.

Thanks in advance, Ben

 

This is a thermostat problem.
Sounds like it's in heatpump mode.

 

Verify that toggle 1 is On, 2 & 3 are Off.

 

My thermostat is type 1F92-71 (white-rodgers) dipswitches 1 2 and 3 are all off 4 is on

 

Here is the installation manual for your stat: White-Rodgers - Thermostats, CSII Features

And the owner's manual: http://www.white-rodgers.com/wrdhom/...037_4741_C.pdf

 

thanks for the manual. unfortunately it couldn't help me out. changing the dipswithes didn't help either. i put them back to the original settings 1 2 and 3 off 4 on

could the thermostat be malfunctioned? and is there a way to test if it is bad.

i am still not sure why i do not get 24v at the gas valve when the thermo calls for heat. any ideas?

 

Is this furnace connected to a heat pump as the first stage heat? If it is, you might be able to set the thermostat for "emergency heat". By doing so, it should bring on the furnace as soon as there is a call for heat.

 

What is the outdoor unit model number?

 

Not sure about the outside unit number, jersey got about 18 inches of the white stuff today. I will check it out in the morning.

How would one go about setting the thermostat to "emergency heat mode"

thanks again

 

how much would i be looking to spend if i was to replace the board? i believe it is an electrical problem because now i am never getting 24v to the gas valve. are the relays part of the circuit board of can they plug and play?

thanks

 

Pages 8-10 of the owners manual should allow you to get into the emer. heat mode.
We are all presuming you have a heat pump with gas as aux. heat. Please verify. A fairly easy way would be to remove the thermostat face & list to which terminals the various color wires are connected. For example if you only have 5 wires & none are connected to a termial marked O or B, it's almost certain you don't have a heat pump.

 

What am I missing?? I don't see that heat pump ever mentioned, except for the tstat.

oops just read Grady's last post

 

This is how my stat is wired
O-Black W1- jumper to Y1
B-X E1- jumper to W2
Y1-yellow & jumper to W1 E2-X
Y2-X L-X
C-Blue R-X
G-Green W2-white & jumper to E1



I am new to learning how a furnace works. What exactly is the heat pump, and is it possible to heat the house with just heat pump coils and not have the burners ignite?

 

Jammin', from your description I can't tell what wire is connected to which terminal. What I was looking for is something like:
White wire connected to W1 with jumper to ...
Yellow wire connected to Y1 with jumper to...
Green wire connected to G
etc, etc,

Thanks

 

Sorry about that, the terminations looked to make sense in the reply but got all smushed when it was posted.

Black wire goes to O
yellow wire goes to Y1 with a jumper to W1
blue wire goes to C
green wire goes to G
red wire goes to R
white wire goes to W2 with a jumper to E1

 

Not sure if it helps but the heat pump model number is 38YH018300, Carrier as well

The burners dont come on at all any more, not even in Emergency Mode

 

Regarding your thermostat wiring: Did your problem result right after installing a new thermostat?, or not?

 

I'm going to have to defer this thread to some of my Carrier accessable colleagues. My dear friends at Carrier don't seem to want to allow me to have access to technical information on their products.

 

Ecman the thermostat is the original from when the condo was built, the wiring has not changed since i moved in about two years ago.

Thanks for the help Grady.

If the heat pump is broken and i switch the thermostat to emergency mode, shouldn't the burners ignite to provide heat?

Does any one know what i would be looking to spend on a new circuit board?

 

Still no heat on emergency mode. Anything else i could do or check for?

 

This post probably belongs in the heat pump forum here.

I don't think anybody here knows off the top of their head what chain of events takes place when the HP can't produce or keep up with the low temps, and has to go to emergency/aux. gas heat. There are bound to be sensors and relays - that unless one saw a wiring diagram, could only speculate on, unless one has enough experience in this department.

Is there a schematic on say the blower door or elsewhere that you could try to take a pic of and post for us here?

And then there is the issue that if the low temps are not why the HP is not doing it's normal job, that perhaps the outside unit is not doing it's job, and needs to be looked at. Is that unit outside even running when you create a call for heat?

What IS your outside temp ther right now and /or when you first had trouble with the emergency heat not coming on anymore? We know that it did in your first post, but then later post said it no longer would. Did the outside get colder when you noticed that emergency heat would no longer come on? Or - could it even have gotten warmer out. Just guessing, but maybe if it got warmer, the emergency heat will not come on and must run conventional HP mode. And if something is wrong in the inside or outside units, you would be SOL. Not sure though if that be the case. Just a possible theory that could explain why you no longer get emergency heat.