Question about Heating & Cooling

Open Question

My bonaire evaporative cooler cycles from high to low fan speeds when set in the cool mode. It works fine at the required speed setting when just the fan (no water) is selected. It also dumps water immediatly the cooling cycle is turned off rather than holding it for about 40Min as it should. Sounds like a controller problem, but I'm not sure if it would be the touch pad or the board up on the roof mounted unit.

Posted by on

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya Repairman can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Repairman (only for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad
  • 121 Answers

SOURCE: Front unit high cool and high fan not working

I would recommend you take this unit to an RV service center. The issue could be due to many variables. It could be something as simple as the controller board relay or a low freon level. You may also be able to call a regular home heating and airconditioning shop to take a look at the unit. Keep me posted and if you found this solution helpful please rate it when you get a chance. Good Luck - Tech101

Posted on Jun 25, 2008

Ad
  • 1 Answer

SOURCE: AC pad not fully getting saturated with water

1. Make sure the pump is getting plenty of water.

2. Make sure the pump is working.

3. Check the pvc pipe with drip holes are not plug. (above the pads )

4. Check the pads directional arrow that should be facing up. When pads are initially installed you can see arrows on the pads. The arrows should be in the up direction. That will allow the pads to get saturated more efficiently.

I hope these steps help you.

Jerry,

Posted on May 08, 2009

  • 1 Answer

SOURCE: fan works on all speed, and low cool is working but does not change to medium or High

i need a wiring diagraham for a duo-therm mod# 54812-136

Posted on Jun 22, 2009

james3751
  • 614 Answers

SOURCE: This is a heating and

You have a bad board or bad switch. I would say board. You can have service tech check this out. There is only so far you can go without knowledge of Controls ad electricity. Russ

Posted on Jul 22, 2009

jeffbvegas1
  • 520 Answers

SOURCE: need replacement pads for mastercool mrc55wa

These pads are available in different sizes and styles at home improvement stores like LOWES or HOME DEPOT (in season)

Posted on Sep 18, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

When i start my 2008 Cadillac sts i get a notification that engine hot A./C off. Even though it is the first time i stated it today


ENGINE HOT - AC OFF
Cooling System Description and Operation

you must have a cooling system problem of some sort !

Do the cooling fans come on when A/C is switched on ? Fan's should come on ! Does your vehicle have two or three cooling fan's ?
Cooling Fan Control - Two Fan System
The engine cooling fan system consists of 2 puller type electrical cooling fans and 3 fan relays. The relays are arranged in a series parallel (S/P) configuration that allows the engine control module (ECM) to operate both fans together at low or high speeds. The cooling fans and fan relays receive battery positive voltage from the underhood fuse block. The ground path is provided at G104.
During low speed operation, the ECM supplies the ground path for the low speed fan relay through the low speed cooling fan relay control circuit. This energizes the low speed fan relay coil, closes the relay contacts, and supplies battery positive voltage from the low fan fuse through the cooling fan motor supply voltage circuit to the left cooling fan. The ground path for the left cooling fan is through the cooling fan S/P relay and the right cooling fan. The result is a series circuit with both fans running at low speed.
During high speed operation the ECM supplies the ground path for the low speed fan relay through the low speed cooling fan relay control circuit. After a 3 second delay, the ECM supplies a ground path for the high speed fan relay and the cooling fan S/P relay through the high speed cooling fan relay control circuit. This energizes the cooling fan S/P relay coil, closes the relay contacts, and provides a ground path for the left cooling fan. At the same time, the high speed fan relay coil is energized closing the relay contacts, and provides battery positive voltage from the high fan fuse on the cooling fan motor supply voltage circuit, to the right cooling fan. During high speed fan operation, both engine cooling fans have their own ground path. The result is a parallel circuit with both fans running at high speed.
The ECM commands the low speed cooling fans ON under the following conditions:
• Engine coolant temperature exceeds approximately 94.5°C (202°F).
• A/C refrigerant pressure exceeds 1447 kPa (210 psi).
• After the vehicle is shut OFF, if the engine coolant temperature at key-off is greater than 101°C (214°F), the low speed fans will run for a minimum of 60 seconds. After 60 seconds, if the coolant temperature drops below 101°C (214°F), the fans will shut OFF. The fans will automatically shut OFF after 3 minutes, regardless of coolant temperature.
The ECM commands the high speed fans ON under the following conditions:
• Engine coolant temperature exceeds approximately 104.25°C (220°F).
• A/C refrigerant pressure exceeds approximately 1824 kPa (265 psi).
• When certain DTCs set
At idle and very low vehicle speeds the cooling fans are only allowed to increase in speed, if required. This ensures idle stability by preventing the fans from cycling between high and low speed.
Cooling

Having a qualified professional technician check it out would be your best bet ! Hooking up a factory or professional type scanner an check data input's an DTC'S - diagnostic trouble codes .

Diagnostic Starting Point - Engine Cooling
Begin the system diagnosis with the diagnostic system check. Refer to Diagnostic System Check - Vehicle . The Diagnostic System Check - Vehicle will provide the following information:
• The identification of the control modules which command the system
• The ability of the control modules to communicate through the serial data circuits
• The identification of any stored DTCs and their status
The use of the Diagnostic System Check - Vehicle will identify the correct procedure for diagnosing the system and where the procedure is located.

DTC P0480: Cooling Fan Relay 1 Control Circuit
DTC P0481: Cooling Fan Relay 2 Control Circuit
DTC P0480: Cooling Fan Relay 1 Control Circuit
DTC P0481: Cooling Fan Relay 2 Control Circuit
DTC P0691: Cooling Fan Relay 1 Control Circuit Low Voltage
DTC P0692: Cooling Fan Relay 1 Control Circuit High Voltage
DTC P0693: Cooling Fan Relay 2 Control Circuit Low Voltage
DTC P0694: Cooling Fan Relay 2 Control Circuit High Voltage
DTC P1258: Engine Coolant Overtemperature - Protection Mode Active
DTC P2600: Auxiliary Coolant Pump Relay Control Circuit
DTC P2601: Auxiliary Coolant Pump Performance
DTC P2602: Auxiliary Coolant Pump Relay Control Circuit Low Voltage
DTC P2603: Auxiliary Coolant Pump Relay Control Circuit High Voltage

Dec 10, 2017 | Cadillac Cars & Trucks

1 Answer

I have a 2006 buick lucerne 3.8 v6 cxl.my coolinf fans dont come on .i need to know how to change the relay and the fuse.


Your vehicle cooling fan's are controlled by three relay's , couple of fuse's an the PCM - engine computer . The engine coolant temp. sensor is a input to the PCM , when engine temp get's to 212 the PCM will turn on the cooling fans in low speed . Checking to see what the actual temp is with a scan tool an a infrared thermometer at the thermostat housing ,an looking up the specification's in a service repair manual is how to diagnose . Not guessing an replacing parts . Plus learning how the cooling fan's work .
Relay Driven Dual Cooling Fan Diagnostics Reading factory service info as to how they work also would be a good idea .

Cooling Fan Control - Two Fan System
The engine cooling fan system consists of 2 puller type electrical cooling fans and 3 fan relays. The relays are arranged in a series parallel (S/P) configuration that allows the engine control module (ECM) to operate both fans together at low or high speeds. The cooling fans and fan relays receive battery positive voltage from the underhood fuse block. The ground path is provided at G104.
During low speed operation, the ECM supplies the ground path for the low speed fan relay through the low speed cooling fan relay control circuit. This energizes the low speed fan relay coil, closes the relay contacts, and supplies battery positive voltage from the low fan fuse through the cooling fan motor supply voltage circuit to the left cooling fan. The ground path for the left cooling fan is through the cooling fan S/P relay and the right cooling fan. The result is a series circuit with both fans running at low speed.
During high speed operation the ECM supplies the ground path for the low speed fan relay through the low speed cooling fan relay control circuit. After a 3 second delay, the ECM supplies a ground path for the high speed fan relay and the cooling fan S/P relay through the high speed cooling fan relay control circuit. This energizes the cooling fan S/P relay coil, closes the relay contacts, and provides a ground path for the left cooling fan. At the same time, the high speed fan relay coil is energized closing the relay contacts, and provides battery positive voltage from the high fan fuse on the cooling fan motor supply voltage circuit, to the right cooling fan. During high speed fan operation, both engine cooling fans have their own ground path. The result is a parallel circuit with both fans running at high speed.
The ECM commands the low speed cooling fans ON under the following conditions:
• Engine coolant temperature exceeds approximately 94.5°C (202°F).
• A/C refrigerant pressure exceeds 1447 kPa (210 psi).
• After the vehicle is shut OFF, if the engine coolant temperature at key-off is greater than 101°C (214°F), the low speed fans will run for a minimum of 60 seconds. After 60 seconds, if the coolant temperature drops below 101°C (214°F), the fans will shut OFF. The fans will automatically shut OFF after 3 minutes, regardless of coolant temperature.
The ECM commands the high speed fans ON under the following conditions:
• Engine coolant temperature exceeds approximately 104.25°C (220°F).
• A/C refrigerant pressure exceeds approximately 1824 kPa (265 psi).
• When certain DTCs set
At idle and very low vehicle speeds the cooling fans are only allowed to increase in speed, if required. This ensures idle stability by preventing the fans from cycling between high and low speed.

Dec 10, 2017 | Buick Cars & Trucks

1 Answer

Why is the fan only running on low speed?


Hi David. when the air conditioning is energised by the thermostat it should automaticly bump up to high fan speed, if it has been running for a while it ciould be freezing up the evaporator and causing a restricted air flow to come out. you may need to shut the cooling mode off and just leave the fan running for a few hours. hope this helps

Jun 03, 2014 | Dometic Rooftop RV Air Conditioner

1 Answer

Can i install a time temp. type defrost control instead of the demand defrost type in the above unit? also i see no reason for the fan control board (low to High speed) since the fan motor does not call...


Defrost timer might be more reliable here in NY I set them @ 45minutes..The fan speed is out side tempature (ambient) selected ,low speed, running when its cooler out but you still use cooling.HIGH speed being the default speed.High/low during spring and low all winter.If your new motor is only one speed power it direct from the contactor

Jun 07, 2011 | Heating & Cooling

1 Answer

High speed does not work but low speed does. Is there an easy fix, or will this require a motor replacement to get both speeds working again? The cooler is a Mastercool model MC64C


If your motor only works on low speed and not on high speed first check to see if you have the proper voltage to high speed. Check with a voltmeter or multimeter, check from common on the motor to high speed on the motor at the switch. If you have the proper voltage then you have an open winding on high speed and the motor needs replaced. If you don’t have the proper voltage or any volts, then the switch is bad and needs replaced. This also will be the same if, medium speed won’t work and low speed does.

May 29, 2010 | Mastercool 67680 Evaporative Cooler Air...

1 Answer

Motor does not go from low speed to high speed If the motor is set to low speed it does not turn on until the high speed range is hit then it tries to go from stop to high speed and throws thw belt


MOST OF THE TIME IT IS THE DIGITAL THERMOSTAT OR LOOSE TERMINAL AT THERM. THESE STATS ARE TRICKY TO CHECK. LIKE WHITE ROGERS 4 WIRES CONTROL WITH A RED WIRE TO GREEN YOU GET PUMP WHITE YOU GET LOW YELLOW YOU GET HIGH AND SO FORTH. MASTER COOL DOES IT DIFFERENT SO YOU BUY THEIR TSTAT

Apr 21, 2010 | Mastercool 67680 Evaporative Cooler Air...

1 Answer

Evaporative Cooler Bonaire Profile do you put water in this item? or does it cool alone, it has a cool setting with a water drop sign?? besides the fan function


Yes, it does require you to pour water into it from the back opening (where the aspen pad is located). I have one myself it works well on days up to 35degrees, the other temperatures higher it just acts as a spot cooler.

Thank you for submitting, and Happy New Year

T.Scott

Jan 07, 2010 | Heating & Cooling

2 Answers

Fan will not run on high. Compressor runs fine but the fan will not run on high. Works fine on low and med.


It's the mode switch contactors for the high setting just overview the wiring of the high cool or high fan contactors if it's not there check all leads for the high fan or high cool circuitry.

Aug 01, 2009 | Coleman Mach III Air Conditioner

2 Answers

Fan is slow


I dont have a solution, but I have a similar problem with a Bonaire evap rooftop cooler which only started after a tech came to look at the unit when it stopped operating properly last summer. He said it uses less water now, but the issue is that it doesnt cool any where near as effectively with the fan speed so low. I am located in Melb Australia, and wonder if you are in the same area. I am going to call service AGAIN & get the minimum fan speed returned to what it was previously. I wonder if my original unit is too small for the house - but nevertheless, it used to work beautifully and now is a very poor example of evap cooling. The service guy said the base fan speed could be altered from the controller, but we dont know how to get into the setup menu.

Jan 30, 2009 | Dometic Rooftop RV Air Conditioner

Not finding what you are looking for?
Heating & Cooling Logo

Related Topics:

64 people viewed this question

Ask a Question

Usually answered in minutes!

Top Heating & Cooling Experts

Paul Carew

Level 3 Expert

3087 Answers

Dan Webster
Dan Webster

Level 3 Expert

8220 Answers

Tim Whalen

Level 3 Expert

3074 Answers

Are you a Heating and Cooling Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...