Question about Echo PB 770H Backpack Blower

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Blower will not shut off when coil is grounded

Grounding terminal on coil direct to motor

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  • Echo Master
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Then you need to replace the coil as it is internally faulty.

Posted on Dec 10, 2014

Testimonial: "Thank you for confirming my thought, I never ran into one that would not shut off."

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I replaced the blower, and resister on my 2012 chevy. impala but blower still don't work. What fuse do I need to check


The fuse box should be under the hood, passenger side. Try the upper box, middle right side Mine is huge, 30 amp

Sep 23, 2016 | 2012 Chevrolet Chevrolet Impala LT

1 Answer

2007 Buick Lucerne CXL: Cooled seats not working. LIghts come on, temperature adjusters work but the motors under the seats do not come on.


Air Circulation
When the heated/cool seat switch is pressed to initiate operation of the climate control seat (CCS) system, cabin air is drawn through the heated/cool ventilation module air filter, then directed through passages in the foam of the seat cushion and seat back to the seat's occupant. In order for the CCS system to operate to its optimum performance, it is crucial to have unrestricted air flow through the system. A dirty or restricted air filter, the blockage of an exhaust air duct, a misaligned heated/cool ventilation module, or incorrect foam installation of the seat cushion or seat back will all have negative effects on CCS operation.
Heated/Cool Ventilation Module
Each heated/cool seat has 2 ventilation modules, one located under the seat cushion and one located in the seat back. These modules are controlled by the climate control seat module (CCSM). Each ventilation module contains a thermo-electric device (TED), a temperature sensor, and a blower motor. The TED and temperature sensor are mounted downstream of the blower motor. Each TED consists of a circuit of positive and negative connections sandwiched between 2 ceramic plates. Each ceramic plate is equipped with copper fins for heat exchange. The air flowing past these fins is either directed as conditioned air into the seat cushion and seat back, or directed into the cabin as waste air.
A TED is essentially a solid state heat pump that is used to heat or cool the air supply to the seat cushion and seat back. When voltage is applied to a TED, one side releases energy as heat, while the opposite side absorbs energy and gets cold. When the polarity of the current flow to the TEDs is switched, the hot and cool sides of the TED reverse.
During the following climate control seat system description and operation, the TEDs, blower motors, and temperature sensors will be referenced independently even though they are all packaged together as a module.
Climate Control Seat (CCS) System
The CCS system consists of two heated/cool ventilation modules and one climate control seat module (CCSM) that controls both the driver and passenger heated/cool seats systems. The CCSM is mounted below the front passenger seat cushion. It receives power from both, battery positive voltage and ignition 3 voltage.
Once a CCS system is activated, cabin air is drawn through the seat blower motors and directed across the fins of each of the thermo-electric device (TED) located under the seat cushion and in the seat back. The air is either heated or cooled as it passes over the TEDs. This conditioned air is then directed through channels in the foam of the seat pad and through small holes in the seat cover to the occupant. Once the system is activated, the CCSM uses a set of algorithms to control the temperature of the selected heating or cooling modes.
Your best bet is to take your vehicle to a qualified repair shop an have it diagnosed .
DTC B19A4: Driver Seat Back Blower Speed Circuit High

DTC B19A8: Driver Seat Back Blower Speed Circuit Short to Ground

DTC B103D: Driver Blower Power Circuit

DTC B272E: Driver Seat Back Blower Circuit Open
DTC B19A3: Driver Seat Cushion Blower Speed Circuit High

DTC B19A7: Driver Seat Cushion Blower Speed Circuit Short to Ground

DTC B2729: Driver Seat Cushion Over Temperature
DTC B19A2: Passenger Seat Back Blower Speed Circuit High

DTC B19A6: Passenger Seat Back Blower Speed Circuit Short to Ground

DTC B111D: Passenger Blower Power Circuit

DTC B272F: Passenger Seat Back Blower Circuit Open
DTC B19A1: Passenger Seat Cushion Blower Speed Circuit High

DTC B19A5: Passenger Seat Cushion Blower Speed Circuit Short to Ground

DTC B272A: Passenger Seat Cushion Over Temperature
Driver and Passenger Heated/Cool Seats Inoperative
  1. Ignition OFF, disconnect the C1 harness connector at the CCSM.
  2. Test for less than 5 ohms between the ground circuit terminal M and ground.
  3. ?‡'
    If greater than the specified range, test the ground circuit for an open/high resistance.

  4. Verify that a test lamp illuminates between the B+ circuit terminal E and ground.
  5. ?‡'
    If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

  6. Disconnect the C2 harness connector at the CCSM.
  7. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 1 and ground.
  8. ?‡'
    If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.

  9. If all circuits test normal, replace the CCSM.


Sorry

Jul 10, 2016 | 2007 Buick Lucerne CXS Sedan

1 Answer

2000 Ford E-250 appears to not be getting power to common blower relay terminal. Fan runs on all speeds when 12V is sent to blower motor. Why power loss to common relay terminal. IS there a way to ope


Not sure what a common relay terminal is.
The blower relay gets power from a 50amp fuse. Power goes to the blower motor and the resistor and speed switch provide the ground circuit. The on signal for the blower relay comes from the selector switch.

Jan 24, 2014 | Ford E250 Cars & Trucks

1 Answer

BLOWER FAN WILL NOT RUN ON HIGH SPEED. WHAT TO CHECK??


The relay for the manual blower system is a different relay from the others. It has terminal 87 which is the high amp terminal. It comes through fuse 3 on the relay center, a 30 amp fuse. It it is right hand underhood.

The relay also contacts terminal 87A which is the lower power circuit that gets 25 amp from fuse 5D in the instrument panel fuse block. That supplies the 3 lower speeds and when switched to high applies voltage to the relay switching it from the 25 amp circuit to the 30 amp circuit.

The SAME wiring supplies the blower from the relay on to the blower. The blower uses only one ground which is terminal B on the blower motor. Your motor should have run the same but when you disconnected the terminal socket for both A and B from the blower motor, there was no ground. You do have to supply your own ground!

Easy check is fuse 3 in the relay center. Hope it's blown. Might question why it blew, but that's an easy replacement. I might indicate impending blower motor failure with age and high current loads.

it could indicate the relay is stuck on the 87A contact and not switching under power to the other terminal. Could be primary circuit blown not pulling the relay or could be the contacts are physically burned to the most-used contact.

Jun 06, 2011 | Chevrolet Corvette Cars & Trucks

1 Answer

1996 ford contour heater blower motor doesn't work. only worked on high before


First, check the blower motor fuse. If it is ok, disconnect the electrical lead from the blower motor, and apply direct power and ground to the motor electric terminals. If the blower motor fails to operate, it is defective. If the blower motor now operates with direct power, but doesn't when reconnected to the car's electrical system, there is likely a problem with the switch, the blower motor resistor, or a bad connection in the wiring. Hope this helps.

Jan 10, 2011 | Ford Contour Cars & Trucks

1 Answer

Coleman home heater stops working fault code "limit switch open"


How do you test a pressure switch and other limit controls?
This is for people who are experienced with electrical equipment and the use of a Volt Ohm meter. *Please never by pass a pressure switch or limit control. The pressure switch and limit switches are there for your safety. You would test by setting your volt meter to "Volts AC" and test the rollout switch by placing one meter probe on one terminal of the rollout switch and your other meter probe to a good ground. Have the red probe touching the top terminal of the rollout switch and the black probe touching a ground (body) of the furnace. You should be getting 25.85 volts which means the rollout is good on the top terminal. I would next test the bottom terminal of the rollout by touching the red meter probe to the bottom terminal on the rollout switch and the black terminal to ground. If I get 25.85 volts on the bottom terminal the rollout is good. If I do not get any voltage on the bottom terminal then the rollout has tripped and can be reset (if equipped) by pressing in on the little button or replaced. If your rollout switch is tripped you probably have a stopped up heat exchanger or a leaking heat exchanger. I would recommend calling in a service technician to find out why the rollout switch tripped. If you have an open limit control either the furnace has over heated or the limit has gone bad. Problems that would make a limit open up would be dirty filters, dirty evaporator coil causing a restriction in the air flow or a slow blower motor (check the capacitor on the blower motor to make sure it is good). A weak blower motor capacitor will cause the blower to run slow and eventually fail. Pressure switches, and limit switches can be tested with a meter in the same manner. With the furnace calling for heat you can test each of the terminals on the pressure switch to ground to make sure the pressure switch is closed. You should be getting between 24 to 28 volts from each terminal to ground if the pressure switch is closed. If the pressure switch is open you either have a stopped up vent, drain line (if you have a condensing furnace) or bad pressure switch.

Nov 27, 2010 | Coleman Heating & Cooling

1 Answer

My blower Motor is not working on my 1996 Mercury Mystique. I checked all the fuses, all the fuses work just fine. I then checked the voltage that was getting to the blower motor, and it read 12v. I then...


hello, try this..hook 12 volts directly to the blower motor terminals, it should spin! Check for 12 v at the plug that goes into the blower motor again. if good.. Hook a light tester to 12v supply and then check the ground wire in the plug that goes to the blower motor. if it doesn't light up you have a bad ground connection.
Please vote if this helps

Aug 21, 2010 | Mercury Mystique Cars & Trucks

3 Answers

2003 Suburban heater fan will not working.


three things left to check,
using test light see if you have power at motor with key and switch on,if you do replace motor,if not locate blower motor resistor it will be close to motor,check for power going in,last is the heater control assembly

Dec 10, 2009 | 2003 Chevrolet Suburban 1500

1 Answer

No power getting to the front blower


no. the relays coil is fused # 12 fuse 10 amp and the other side is going directly to ground. the main power for blower goes through that relay and it is fused at # 107 and it is a 40 amp fuse. now the heater control unit witch is what they dials are controls the ground to the blower motor at different resistances with is determine by the dial to change speed.

now if you don't have power with key on at the blower motor i would check them to fuses and if they are okay you need to check the ground at relay socket witch will be the corresponding cavity for # 85 on the relay. if you have all of that and sill no power at blower replace relay.

but to tell you what i see most common is the blower resistor for the motor.

let me know if you have any more question and good luck

Nov 26, 2009 | 2000 Dodge Caravan

1 Answer

2003 Dodge Durango front blower not blowing


The blower motor resistor is bad. Should be right next to blower motor, inserted in the evaporator box.

Nov 04, 2008 | 2002 Dodge Durango

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