Re: Keeprite furnace will come on heat up but the fan or...
Blower motor is either burnt or Ihave also seen the fan relay on the board burnt..test for 120v power out of the board at the blower leads if so replace motor, of no replace board
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Question edited for clarity.
Question moved from Refrigerators to Heating.
The motor has a start capacitor on it, and yours needs replacing. Tell the engineer that when you phone. Tell him it will work if you start it spinning. The start capacitor gives the motor a jolt to get is going and then steady power to run.
When you say door are you referring to the front door or the furnace door? If the unit kicks on AND off by itself I would say it's in the tstat or the tstat wire. If it were internal I would think the blower relay or heat contactor/relay were getting stuck AND THE FAN WOULD NOT TURN OFF until you flipped the breaker. Good luck
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It may be but the fan control may be set to turn off at to high a temp, or theres a short between ;r; and g at the stat or furnace or sequencer, IF it runs through it. A limit or rollout switch may have failed but this will keep the unit from firering. Check for a manual blower switch that may be on. At stat it should be at auto and alsso at the fan control. A stuck relay is always possible,
Do you have the model number? There is a problem with either the blower motor sensor or the ignitor. When the furnace get a signal for heat, the blower motor comes on and then the ignitor. If either one of those fail then it stops, waits and tries again. When the tech was there, if he did not replace any parts then he did not do his job. You can call them back out because the issue was not resolved or you can post the model number for us.
for a few days now my furnace "when it starts theirs a loud whining noise , i did check the noise is coming where the motor area is.. its stops when the blower comes on....but it getting louder! so is it one of the fans??
Expensive is relative, service calls are never free. But if you have an idea what the problem is, you are armed against an unethical service company. Now to what you describe, could be a couple things, first let me explain the difference in fan speeds. Furnaces that both heat and cool have multi-speed blower motors. High speed is for cooling and lower speeds are for heating. The fan switch at the T-Stat turns on the high speed fan relay. The lower speed fan is turned on by either a temperature activated switch (silver box mounted on front on furnace above burners) or a time delay relay which is solid state. That being said, your problem could be a defective fan switch or one of your blower motor windings has gone bad. Most motors have 3 or 4 speeds and a technician could just change speeds and all would be good. A fan/limit switch is not so expensive that you would replace the unit. Bottom line, unless your really handy, a heating company is in your future. Good luck and please rate my answer if it was helpful to you.
have you changed t-stat? if so you need to increase the heat anticipator. if you have a fan limit switch, the setting may need adjusting. Thay will change with age
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