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Old 11-09-2020, 09:05 AM   #1
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2005 Winnebago Vectra heat pump stopped working

Hi, All,

Where do I begin to figure out how to get my heat pump going. It was working fine for about 1 week and then just wouldn't start when switched on in the morning. I have had the coach for a few months and this last week was the first time I used the heat pump. I can hear it try to start for maybe one second and then nothing.

The A/C still works.

Thank you,
Kevin
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Old 11-09-2020, 11:15 AM   #2
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I assume this is a basement unit? Without knowing the model number perhaps this service manual trouble-shooting section contains the answer. You said the cooling works, that verifies all the components work except the reversing valve, but I am not an expert.
Duner is the irv2.com resident expert.
There are several threads concerning basement heat pumps here. Use the Google search box at page top to find them.
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Old 11-09-2020, 02:36 PM   #3
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Thank you.
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Old 11-10-2020, 07:04 AM   #4
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Quote:
Originally Posted by Ray,IN View Post
You said the cooling works, that verifies all the components work except the reversing valve, but I am not an expert.

Nor am I, but that was my impulse as well. In a heat pump, the same components are used for cooling as for heating. The part that controls which function is in use is the reversing valve, which is where I'd start looking. There's probably stuff on YouTube that could be helpful.
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Old 11-10-2020, 07:09 AM   #5
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I agree with Ray,IN about trouble-shooting. Here's a link to the 6535 model FYI:

http://www.rvcomfort.com/pdf_documen...6323_copy8.pdf

Step-by-step trouble shooting is the way to go vs. the "shotgun" approach. Even if your's isn't the exact model as above (or that posted by Ray,IN, the trouble-shooting steps should apply. Some model differences only apply to vent location.
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Old 11-10-2020, 07:22 AM   #6
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One quick check to do ,if it is a basement unit . Set the thermostat less than 4 degrees above the inside temperature and see if it will come on. If the set point of the thermostat is more than 4 degrees above the inside temperature the heat pump will not start , it reverts to the gas furnace and if the LP is off the furnace won't start either . You will hear a click or two as it try's to light the burner and then nothing .
Hope this helps .
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Old 11-10-2020, 10:56 PM   #7
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One quick check to do ,if it is a basement unit . Set the thermostat less than 4 degrees above the inside temperature and see if it will come on. If the set point of the thermostat is more than 4 degrees above the inside temperature the heat pump will not start , it reverts to the gas furnace and if the LP is off the furnace won't start either . You will hear a click or two as it try's to light the burner and then nothing .
Hope this helps .
Actually that is not what the owners manual says. Re-read the manual in one of the links. If I am wrong please correct me, as mine does not operate the way you said.
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Old 11-11-2020, 06:41 AM   #8
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Ray , Thank you for your service . Maybe this will clear it up . I have confirmed the operation on my unit , but never had the furnace and heat pump run at the same time .

https://www.irv2.com/forums/attachme...1&d=1605101949
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Old 11-11-2020, 01:57 PM   #9
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I was doing the research in the manual and in between this and the rest of my day, I found a worn positive cable on the chassis battery the hard way so have been dealing with this now. Thank you all for the help here, and I will get back to is as soon as the batt issue is resolved or at least made safe for the time being.
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Old 11-11-2020, 08:53 PM   #10
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Quote:
Originally Posted by Ray Lenning View Post
One quick check to do ,if it is a basement unit . Set the thermostat less than 4 degrees above the inside temperature and see if it will come on. If the set point of the thermostat is more than 4 degrees above the inside temperature the heat pump will not start , it reverts to the gas furnace and if the LP is off the furnace won't start either . You will hear a click or two as it try's to light the burner and then nothing .
Hope this helps .
We have owned and operated our present coach, an '04 Itasca Horizon 36GD with the C-7 CAT 330HP for 9 years now. And, in that total time, through this forum, and reading some literature, I have always been led to believe that, if you ask for at least 4+ degrees above the ambient temp on the thermostat, and want ELECTRIC heat, the unit (either the basement heat pump or, the thermostat) will automatically engage the furnace, at the same time the basement heat pump is running, so that both units will achieve the desired heat level asked for.

From that point on, the heat pump will handle keeping the temp at the desired level.
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Old 11-11-2020, 09:15 PM   #11
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My experince with residental heat pumps. The first time you start it up after power is off there is a long delay. Have you waited 5 mintues plus?

So if it was the valve I would expect it to run but you would only have heat or cool no matter which state you selected. But the stat would send the demand based on the mode selected.

What are you hearing when it try to start? Are the fans on? If not can you change the mode to fan will it start the fan?

If fan starts are you hearing the compressor trying to start?

If the reversing valve is not working the fans and compressor will run, but in what ever state the unit is designed for non reverse state. I had a carrier that if reserving valve was not energized it was A/C. A Goodman I had if not energized it was heat.
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Old 11-11-2020, 10:53 PM   #12
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Quote:
Originally Posted by Ray Lenning View Post
Ray , Thank you for your service . Maybe this will clear it up . I have confirmed the operation on my unit , but never had the furnace and heat pump run at the same time .

https://www.irv2.com/forums/attachme...1&d=1605101949
Nope, mine does not operate that way. The blower fan motor starts and does not stop again unit set temperature is reached. I can set my 'stat 10 higher than the indoor temperature without the LP furnace coming on, UNLESS the outdoor temperature is 34 or less. At around 34, depending on humidity outdside, the LP furnace will come on if the heat pump cannot maintain or reach set temperature.
Now my heat pump may not be operating as designed, but that's how it rolls.
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Old 11-12-2020, 10:07 AM   #13
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Quote:
Originally Posted by ArtJoyce View Post
My experince with residental heat pumps. The first time you start it up after power is off there is a long delay. Have you waited 5 mintues plus?

So if it was the valve I would expect it to run but you would only have heat or cool no matter which state you selected. But the stat would send the demand based on the mode selected.

What are you hearing when it try to start? Are the fans on? If not can you change the mode to fan will it start the fan?

If fan starts are you hearing the compressor trying to start?

If the reversing valve is not working the fans and compressor will run, but in what ever state the unit is designed for non reverse state. I had a carrier that if reserving valve was not energized it was A/C. A Goodman I had if not energized it was heat.
Yes, I have waited more than an hour. The sound is just as when it works as the fans are tarting to move when it first starts, but it immediately stops now. Yes the fans are on hi and I can change the mode to fan and the fans come right on.
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