No air, no heat! - http://www.hvacmechanic.com/ Forums

Original message

mgunwan

63.201.59.246

"No air, no heat!" , posted Sun 24 Oct 02:39

I have a Rheem RGLD forced air furnace heater...many years old. The fan/blower have abruptly decided not to come on. When I turn up the thermostat, I can see the pilot light up (auto ignition). I replaced the filter too. The fan blades are rotating smoothly and are not clogged. I can hear a buzz in the transformer near the emergency power switch, so am assuming power is getting to the fan. However, setting the thermostat fan switch to "ON" from "AUTO" does not turn on the fan. There is a sticker on the furnace about a trip switch near the "lower left of the draft diverter" but I am unable to find it.

Any pointers? Appreciate any help!

Replies:

xenos
Webmaster

67.71.20.91

"Re(1):No air, no heat!" , posted Sun 24 Oct 09:51

Odds are it's the fan and you should verify it for power. I belive this since you testing it in both heating and cooling witch use 2 differnt relays. This reset switch would disable the gas valve not the fan.

Xenos.

The best way to escape a problem is to solve it.

mgunwan

67.125.88.27

"Re(2):No air, no heat!" , posted Mon 25 Oct 02:35

What is the best way to check if power is reaching the fan ? So far I have not opened the furnace beyond the front panel and having done that does not give me access to the fan's motors or the wires leading up to them. How about the thermostat ? Any way to check if it is sending the right signals (specially when the fan switch is set to "ON") to the furnance ?

Thanks!

xenos
Webmaster

67.71.20.91

"Re(3):No air, no heat!" , posted Mon 25 Oct 17:23

Use a voltage meter in both cases to verify power.

Xenos.

The best way to escape a problem is to solve it.