Community Forums

Dualy Driver · 01-30-2005, 10:30 AM

How can I test furnace operation of my Carrier Air V A/C-heat pump-furnace system? The manual says the heat pump will run and the furnace should start when the temp is below 40. It as not been that cold yet so I don't know if the furnace works. I'd like to know that it functions before I really need it. There should be a way to over-ride the system and run the furnace but I have not found it.
Anyone know how?
Thanks,
Dave

Dualy Driver · 01-30-2005, 10:30 AM

How can I test furnace operation of my Carrier Air V A/C-heat pump-furnace system? The manual says the heat pump will run and the furnace should start when the temp is below 40. It as not been that cold yet so I don't know if the furnace works. I'd like to know that it functions before I really need it. There should be a way to over-ride the system and run the furnace but I have not found it.
Anyone know how?
Thanks,
Dave

DanJenn · 02-02-2005, 10:05 AM

there isn't an override on the unit vent? ( the part in the ceiling)?? i know you can over ride the AC that way

Dualy Driver · 02-02-2005, 04:28 PM

DanJenn,
With the "Emergency" button, I can force the unit into "heat" mode but not into "furnace mode". The manual says the auxiliary heat (furnace) will come on if the heat pump coil temperature/ambient temperature combination would cause coil freeze up. I haven't been able to simulate those conditions.
I also wonder how I would get heat if I didn't have "shore power" to run the heat pump. I may test it that way.
Dave

RV Wizard · 02-03-2005, 01:45 AM

To bypass the heat pump is the way I would test the furnace. All you have to do is go to the furnace and the two wires that go to the t'stat can be seperated from the t'stat and jumped together. After the fan delay relay has heated up the fan will start and the furnace should begin it sequence to ignite and heat. This bypassing will not check the control circuits of the heat pump; ie, the outside coil temp and relays on the heat pump to control the furnace but will insure the furnace is operating when told by the control circuits.