Have gas furnace and this winter,began having

Depends on the cost to repair. Probably a 22 year old furnace is not very efficient also. Take every thing into consideration.
If it still works it may work for a while but you don't want a break down in the middle of winter.

You are correct. If the inducer motor is warm, but not running, it has seized up. If you replace this yourself, I also suggest that when you replace the inducer fan, check to make sure the secondary heat exchanger isn't clogged, or the condensate drain(s). If you have an HVAC contractor replace it, he should do this for you. It shouldn't run more than $350, to have it replaced and he can check for clogs (The price I'm quoting is for standard hours).

You can check this yourself by running the inducer fan without it being attached to the furnace, then attaching it to the furnace. If you notice a significant reduction in airflow, then you have a clogged secondary heat exchanger. I've run across this situation before on this particular model. The owner recenly replaced the inducer motor, but couldn't figure out why he was still having problems. I suspect the clogged heat exchanger contributed to the inducer motor to failing previously, and feel It would definitely be worth checking while you have the fan removed to help eliminate any future problems that could result from this, including heat exchanger failure. The manufacturer of this unit actually recommends you clean the secondary heat exchanger every year, but this is overkill if your furnace was installed and set up properly. I'd recommend doing it every 10 years and you're at that mark now. Instructions on how to do this are in the manual for this unit if you have it. Otherwise, e-mail me at [email protected] and I can send you a copy.

Finally, check the limit and flame roll out switches after replacing, as they could have tripped when the motor failed.

If I am correct, that is a gas furnace, right? I believe it may be between 15 and 20 years. Pro-active with and older gas furnace is never a bad thing. First of all it can become a safety issue, as concerns of heat exchangers cracking and leaking carbon monoxide into the home become increasing. Second, it sure only be 80% efficient, whereas a new condensing furnace today can be up to 95% efficient. That means that you currently only use 80% of the gas you are burning as actual heat transferred into the house via airflow, and the other 20% is literally leaving the house through the flue. So you can increase efficiency dramatically and be safe at the same time by replacing pro-actively

Check the ground wire to the gas valve or the wire in the middle of the gas valve that says mv--pv, and that is a ground..

DO NOT attempt to repair this yourself. LP gas is a very unforgiving gas. Sounds like your heat exchanger is plugged. Yes it can be removed and checked, BUT it is not recommended. Trust your local repair tech. Any heater 15+ years old should be discarded.

All parts have a 5 yr parts warranty

sounds like either the motor is off balance
or is going bad again
either way id be on the phone to the guy who did the rapair
more than likely the set screw on the sqiral cage came loose and now its vibrating

There are 4 -steps for full run time to kick in a furnace.. step-1, inducer fan runs & prove thru the air tube which closes a switch and tell the circuit board to go to step-2, the igniter lights the pilot & prove its lit by heating the thermocouple, which tells the circuit board to go to step-3, opens the gas valve to dump gas in, which will light from the pilot light, and prove by a flame sensor metal stick on the last burner , which heats up and tell the circuit board Saying, ok , I've got flame.. step-4. when the box heats up, it closes a switch and turn on the main fan...! (Some gas-valves has a brain -or circuit board on top of them and are real sensetive to moisture..)