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vpsi, what temp is it outside? Do you have an emergency heat setting on your thermostat? If you do, flick that on and let us know if warm air comes out

No. the fan itself can't touch the housing at all, so its only connected to the motor shaft. If you just straight pull out the motor, the fan will drop and it'll be impossible to perfectly line it...

Cool man, also check out the burners right underneath where the flames burn. There should be a little groove in the burner that connects the first flame to the last flame. The ignitor should be off...

All right man, my teacher helped me figure this one out today. What happens on some propane furnaces is they go into a hard lockout if one of the bad safeties are tripped, like a rollout switch. ...

Unfortunately the drawback of heat pump systems is they drop out about the mid to upper 30s. When the temp outside drops to mid 30s, the condensing unit can't absorb anymore heat. Heat pump systems...

All pressure switches are different and specific to the unit's design. There should be a little yellow sticker on it that says something like .35 in WC

When you changed your ignition control module, did you make sure you got an exact replacement and made sure every wire went back into the same place?

Does the hot surface ignitor light the main...

That's always an option, shopping around for the best price for an install. But if you found the correct motor and fan yourself, and the model numbers match up, I'd say buy the parts and just pay a...

Do you have the manual to see what the 5 flashes means?

And you made sure the gas valve is on?

Do this real fast, take your thermostat cover off so you can see the wires. Make sure the red...

Unfortunately its hard to diagnose over the internet, you'll probably have to call a tech to look at it. Can you give us more info like how cold is it outside, how warm is it inside, what do you...

I don't know for sure, but it seems like you would just need to replace the fan blade instead of the motor. If it only does it at high speed, maybe the crack causes the fan blade to scrape against...

Also if you can see, make sure the little orifices that shoot the gas out aren't clogged. Over time they may be partially clogged and cause uneven gas flow. Try and clear them out with like a...

I'm glad you're vacuuming up but what I meant is that little sensor may be dirty. Its very sensitive. Can you tell if it looks charred or dirty?

On the thermostat one switch should say fan on or fan auto. If its on fan on, the fan will run, make sure its set to auto. With fan turned to auto and the heat/off/cool turned to off, the fans...

Could be several reasons, is the thermostat new? Is the furnace new or old?

If you just installed a new thermostat, sometimes you have to set what is called the heat anticipator. Also you got to...

The white stuff is frost and is normal. With heat pumps, they stop producing enough heat when the outside temp reaches the high to mid 30's, which is why auxiliary (also called emergency) heat is...

Does the fan turn on, can you feel cold air blowing out of your vents?

Where you see the pilot light, is it burning onto a little rod? If so, that's a flame sensor and it won't allow the gas valve...

Basically, seer ratings mean how efficiently the system uses its electricity. Higher seer means more energy efficient. The seer is calculated over the entire year, so the difference between 13 and...

Do you smell gas near the furnace while its running?

Does it use a pilot light that maybe burned out?

By nothing happens, do you mean it doesn't get warmer or the system won't turn on at all?

Are you in like an apartment type building or a house?

Somewhere in your owners manual it should describe what an E 13 error code means. What does that say?

Well the fan not starting in heat mode is a problem because it runs before the ignitor ignites the burner. It needs to blow the stagnant air out before the burners ignite as an added safety...

It makes sense that the compressor cycles on and off but the fan stays on when the temp outside drops. Heat pumps don't perform well when the temp drops below 30s so that's why second stage heat is...

The humming may very well be coming from your compressor when you hear it click on. My guess the thermostat is calling for cooling and your compressor kicks on, and your fan should kick on too since...